diff --git a/alouette.py b/alouette.py
index cb108c5..92323cd 100644
--- a/alouette.py
+++ b/alouette.py
@@ -104,38 +104,48 @@ def interpolate_index(self, **kwargs):
 
 scripts = ASSET_PATH.joinpath("scripts.js").resolve()
 
-# external_stylesheets = ['https://wet-boew.github.io/themes-dist/GCWeb/assets/favicon.ico',
-#                         'https://use.fontawesome.com/releases/v5.8.1/css/all.css',
-#                         'https://wet-boew.github.io/themes-dist/GCWeb/css/theme.min.css',
-#                         'https://wet-boew.github.io/themes-dist/GCWeb/wet-boew/css/noscript.min.css']  # Link to external CSS
+external_stylesheets = [
+    'https://canada.ca/etc/designs/canada/wet-boew/css/wet-boew.min.css',
+    'https://canada.ca/etc/designs/canada/wet-boew/css/theme.min.css',
+    'https://use.fontawesome.com/releases/v5.8.1/css/all.css'
+    # 'assets/gc_theme_cdn/assets/favicon.ico',
+    # 'https://use.fontawesome.com/releases/v5.8.1/css/all.css',
+    # 'assets/gc_theme_cdn/css/theme.min.css',
+    # 'https://wet-boew.github.io/themes-dist/GCWeb/wet-boew/css/noscript.min.css'
+]  # Link to external CSS
+
+external_scripts = [
+    # 'https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.js',
+    # 'https://wet-boew.github.io/themes-dist/GCWeb/wet-boew/js/wet-boew.min.js',
+    # 'assets/gc_theme_cdn/js/theme.min.js',
+    # 'https://cdn.plot.ly/plotly-locale-de-latest.js',
+    '//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js',
+    'https://canada.ca/etc/designs/canada/wet-boew/js/wet-boew.min.js',
+    'https://canada.ca/etc/designs/canada/wet-boew/js/theme.min.js',
+    'assets/scripts.js'
+
+
+]
 
 # external_stylesheets = [
-#     # 'assets/gc_theme/GCWeb/assets/favicon.ico',
+#     # 'https://wet-boew.github.io/themes-dist/GCWeb/GCWeb/assets/favicon.ico',
 #     'https://use.fontawesome.com/releases/v5.8.1/css/all.css',
-#     # 'assets/gc_theme/GCWeb/css/theme.min.css',
+#     'https://wet-boew.github.io/themes-dist/GCWeb/GCWeb/css/theme.min.css',
+#     'assets/custom.css'
 #     # 'assets/gc_theme/wet-boew/css/noscript.min.css',
 #     # 'https://www.canada.ca/etc/designs/canada/cdts/gcweb/v4_0_30/cdts/compiled/wet-en.js'
 #     ]  # Link to external CSS
 
-external_stylesheets = [
-    # 'https://wet-boew.github.io/themes-dist/GCWeb/GCWeb/assets/favicon.ico',
-    'https://use.fontawesome.com/releases/v5.8.1/css/all.css',
-    'https://wet-boew.github.io/themes-dist/GCWeb/GCWeb/css/theme.min.css',
-    'assets/custom.css'
-    # 'assets/gc_theme/wet-boew/css/noscript.min.css',
-    # 'https://www.canada.ca/etc/designs/canada/cdts/gcweb/v4_0_30/cdts/compiled/wet-en.js'
-    ]  # Link to external CSS
-
-external_scripts = [
-    'https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.js',
-    'https://wet-boew.github.io/themes-dist/GCWeb/wet-boew/js/i18n/en.min.js',
-    'https://cdn.plot.ly/plotly-locale-de-latest.js',
-    'https://wet-boew.github.io/themes-dist/GCWeb/wet-boew/js/deps/jquery.magnific-popup.min.js',
-    'https://wet-boew.github.io/themes-dist/GCWeb/GCWeb/js/theme.min.js',
-    'assets/scripts.js',
-    # 'https://www.canada.ca/etc/designs/canada/cdts/gcweb/v4_0_30/cdts/compiled/wet-en.js',
-    # 'https://www.canada.ca/etc/designs/canada/cdts/gcweb/v4_0_30/cdts/compiled/soyutils.js'
-]
+# external_scripts = [
+#     'https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.js',
+#     'https://wet-boew.github.io/themes-dist/GCWeb/wet-boew/js/i18n/en.min.js',
+#     'https://cdn.plot.ly/plotly-locale-de-latest.js',
+#     'https://wet-boew.github.io/themes-dist/GCWeb/wet-boew/js/deps/jquery.magnific-popup.min.js',
+#     'https://wet-boew.github.io/themes-dist/GCWeb/GCWeb/js/theme.min.js',
+#     'assets/scripts.js',
+#     # 'https://www.canada.ca/etc/designs/canada/cdts/gcweb/v4_0_30/cdts/compiled/wet-en.js',
+#     # 'https://www.canada.ca/etc/designs/canada/cdts/gcweb/v4_0_30/cdts/compiled/soyutils.js'
+# ]
 
 def get_config_dict():
     config = configparser.RawConfigParser()
@@ -567,9 +577,6 @@ def build_filtering():
                                 #     marks=year_dict
                                 # ),
                                 html.Div([
-                                    html.Label(
-                                        htmlFor='date_picker_range'
-                                    ),
                                     dcc.DatePickerRange(
                                         id='date_picker_range',
                                         min_date_allowed=dt.datetime(1962, 9, 29),
@@ -614,7 +621,13 @@ def build_filtering():
                                     ),
                                     html.Div(children=html.P(id="ground_station_selection"),className="wb-inv")]),
                                 html.Div([
-                                    dbc.Alert(color="secondary", id="pos_alert", is_open=False, fade=False, style={"margin-top":"0.5em"}),
+                                    dbc.Alert(
+                                        color="secondary",
+                                        id="pos_alert",
+                                        is_open=False,
+                                        fade=False,
+                                        style={"margin-top":"0.5em"}
+                                    ),
                                 ]),
 
                             ],
@@ -2059,6 +2072,8 @@ def make_viz_map(start_date, end_date, stat_selection, var_selection, lat_min, l
         Output("Graph_description-2", "children"),
         Output("stat-selection-text", "children"),
         Output("stat-y-axis-text", "children"),
+        Output("date_picker_range", "start_date_placeholder_text"),
+        Output("date_picker_range", "end_date_placeholder_text"),
         Output("ground_station_list", "options"),
         Output("x_axis_selection_1", "options"),
         Output("y_axis_selection_1", "options"),
@@ -2101,6 +2116,8 @@ def translate_static(x):
                 _("Map showing either minimum frequency or maximum depth values at each ground station. Each station is represented by a circle, the size of which depends on either the mean or median values of the variables selected. Explore the data by selecting different variables in the drop-down menu on the right."),
                 _("Select statistic:"),
                 _("Select plotted value:"),
+                _("Select start date"),
+                _("Select end date"),
                 [  # Ground_station_options
                     {'label': _('Resolute Bay, No. W. Territories'), 'value': 'Resolute Bay, No. W. Territories'},
                     {'label': _('Blossom Point, Maryland'), 'value': 'Blossom Point, Maryland'},
diff --git a/assets/compiled.css b/assets/compiled.css
index 329d6ae..3ab1525 100644
--- a/assets/compiled.css
+++ b/assets/compiled.css
@@ -218,8 +218,6 @@ input[type="button"] {
   font-size: 13px;
 }
 
-
-}
 .button:hover,
 button:hover,
 input[type="submit"]:hover,
diff --git a/assets/scripts.js b/assets/scripts.js
index d6daa19..6b42c0f 100644
--- a/assets/scripts.js
+++ b/assets/scripts.js
@@ -3,6 +3,14 @@ const expected_canvas_count = 8;
 $(document).ready(function(){
     var canvas_check = setInterval(checkForCanvases, 3000);
 
+    var css_fixer = setInterval(removeBaddCss, 3500);
+
+    var ariaFixes = setInterval(function(){
+        var dropdowns = $('.Select-input input');
+        dropdowns.removeAttr('aria-owns');
+        $('.Select-input').attr('role', 'option');
+    }, 3000);
+
     // Callback function to execute when mutations are observed
     const callback = function(mutationsList, observer) {
         // Use traditional 'for loops' for IE 11
@@ -17,6 +25,17 @@ $(document).ready(function(){
         }
     };
 
+    function removeBaddCss(){
+        $("head").find('style').each(function () {
+            // console.log('removing css');
+            html = $(this).html();
+            if(html.match(/border-color:\s*transparent\s*inherit\s*transparent\s*transparent\s*!important/gm)){
+                $(this).html( html.replace(/border-color:\s*transparent\s*inherit\s*transparent\s*transparent\s*!important/gm,"") );
+            }
+        });
+        
+    }
+
     // Create an observer instance linked to the callback function
     const observer = new MutationObserver(callback);
 
diff --git a/header_footer.py b/header_footer.py
index 8a6bf75..8726ba6 100644
--- a/header_footer.py
+++ b/header_footer.py
@@ -448,6 +448,14 @@
 '''
 
 gc_header_en = '''
+<div class='global-header'>
+<nav>
+  <ul id="wb-tphp" class="wb-init wb-disable-inited">
+	  <li class="wb-slc"><a class="wb-sl" href="#react-entry-point">Skip to main content</a></li>
+	  <!-- <li class="wb-slc"><a class="wb-sl" href="#wb-info">Skip to "About government"</a></li>
+    <li class="wb-slc"><a class="wb-sl" href="?wbdisable=true" rel="alternate">Switch to basic HTML version</a></li> -->
+  </ul>
+</nav>
 <header>
 	<div id="wb-bnr" class="container">
 		<div class="row">	
@@ -509,6 +517,7 @@
   '''+ gc_breadcrumb_en +'''
 	
 </header>
+</div>
 '''
 
 gc_header_en_old ='''
@@ -1012,6 +1021,14 @@
 '''
 
 gc_header_fr = '''
+<div class='global-header'>
+<nav>
+  <ul id="wb-tphp" class="wb-init wb-disable-inited">
+	  <li class="wb-slc"><a class="wb-sl" href="#react-entry-point">Passer au contenu principal</a></li>
+	  <!--<li class="wb-slc"><a class="wb-sl" href="#wb-info">Passer à « Au sujet du gouvernement »</a></li>
+    <li class="wb-slc"><a class="wb-sl" href="?wbdisable=true" rel="alternate">Passer à la version HTML simplifiée</a></li>-->
+  </ul>
+</nav>
 <header>
 	<div id="wb-bnr" class="container">
 		<div class="row">
@@ -1096,6 +1113,7 @@
 
 
 </header>
+</div>
 '''
 
 gc_header_fr_old = '''
diff --git a/translations/fr/LC_MESSAGES/messages.mo b/translations/fr/LC_MESSAGES/messages.mo
index e8fbd11..567892e 100644
Binary files a/translations/fr/LC_MESSAGES/messages.mo and b/translations/fr/LC_MESSAGES/messages.mo differ
diff --git a/translations/fr/LC_MESSAGES/messages.po b/translations/fr/LC_MESSAGES/messages.po
index e9b2c4f..de7aab6 100644
--- a/translations/fr/LC_MESSAGES/messages.po
+++ b/translations/fr/LC_MESSAGES/messages.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2021-03-26 15:33-0300\n"
+"POT-Creation-Date: 2021-04-23 14:06-0300\n"
 "PO-Revision-Date: 2020-01-20 16:09-0500\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: fr\n"
@@ -18,231 +18,223 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Generated-By: Babel 2.8.0\n"
 
-#: alouette.py:169 alouette.py:2040 controls.py:7
+#: alouette.py:234 alouette.py:2106 controls.py:7
 msgid "Resolute Bay, No. W. Territories"
 msgstr "Resolute Bay, Territoires du Nord-Ouest"
 
-#: alouette.py:170 alouette.py:2041 controls.py:8
+#: alouette.py:235 alouette.py:2107 controls.py:8
 msgid "Blossom Point, Maryland"
 msgstr "Blossom Point, Maryland"
 
-#: alouette.py:171 alouette.py:2042 controls.py:9
+#: alouette.py:236 alouette.py:2108 controls.py:9
 msgid "South Atlantic, Falkland Islands"
 msgstr "Atlantique Sud, îles Malouines"
 
-#: alouette.py:172 alouette.py:2043 controls.py:10
+#: alouette.py:237 alouette.py:2109 controls.py:10
 msgid "St. John's, Newfoundland"
 msgstr "St. John's, Terre-Neuve"
 
-#: alouette.py:173 alouette.py:2044 controls.py:11
+#: alouette.py:238 alouette.py:2110 controls.py:11
 msgid "Orroral Valley, Australia"
 msgstr "Vallée de l'Orroral, Australie"
 
-#: alouette.py:174 alouette.py:2045 controls.py:12
+#: alouette.py:239 alouette.py:2111 controls.py:12
 msgid "Prince Albert, Canada"
 msgstr ""
 
-#: alouette.py:175 alouette.py:2046 controls.py:13
+#: alouette.py:240 alouette.py:2112 controls.py:13
 msgid "Ottawa, Canada"
 msgstr ""
 
-#: alouette.py:176 alouette.py:2047 controls.py:14
+#: alouette.py:241 alouette.py:2113 controls.py:14
 msgid "Byrd Station, Antartica"
 msgstr "Station Byrd, Antarctique"
 
-#: alouette.py:177 alouette.py:2048 controls.py:15
+#: alouette.py:242 alouette.py:2114 controls.py:15
 msgid "Las Palmas, Canary Island"
 msgstr "Las Palmas, île des Canaries"
 
-#: alouette.py:178 alouette.py:2049 controls.py:16
+#: alouette.py:243 alouette.py:2115 controls.py:16
 msgid "Winkfield, England"
 msgstr "Winkfield, Angleterre"
 
-#: alouette.py:179 alouette.py:2050 controls.py:17
+#: alouette.py:244 alouette.py:2116 controls.py:17
 msgid "Fort Myers, Florida"
 msgstr "Fort Myers, Floride"
 
-#: alouette.py:180 alouette.py:2051 controls.py:18
+#: alouette.py:245 alouette.py:2117 controls.py:18
 msgid "Antofagasta, Chile"
 msgstr ""
 
-#: alouette.py:181 alouette.py:2052 controls.py:19
+#: alouette.py:246 alouette.py:2118 controls.py:19
 msgid "East Grand Forks, Minnesota"
 msgstr ""
 
-#: alouette.py:182 alouette.py:2053 controls.py:20
+#: alouette.py:247 alouette.py:2119 controls.py:20
 msgid "Rosman, No. Carolina"
 msgstr "Rosman, Caroline du Nord"
 
-#: alouette.py:183 alouette.py:2054 controls.py:21
+#: alouette.py:248 alouette.py:2120 controls.py:21
 msgid "College, Fairbanks, Alaska"
 msgstr "Collège, Fairbanks, Alaska"
 
-#: alouette.py:184 alouette.py:2055 controls.py:22
+#: alouette.py:249 alouette.py:2121 controls.py:22
 msgid "Woomera, Australia"
 msgstr "Woomera, Australie"
 
-#: alouette.py:185 alouette.py:2056 controls.py:23
+#: alouette.py:250 alouette.py:2122 controls.py:23
 msgid "Gilmore Creek, Fairbanks, Alaska"
 msgstr ""
 
-#: alouette.py:186 alouette.py:2057 controls.py:24
+#: alouette.py:251 alouette.py:2123 controls.py:24
 msgid "Tromso, Norway"
 msgstr "Tromso, Norvège"
 
-#: alouette.py:187 alouette.py:2058 controls.py:25
+#: alouette.py:252 alouette.py:2124 controls.py:25
 msgid "University of Alaska, Fairbanks, Alaska"
 msgstr "Université de l'Alaska, Fairbanks, Alaska"
 
-#: alouette.py:188 alouette.py:2059 controls.py:26
+#: alouette.py:253 alouette.py:2125 controls.py:26
 msgid "Darwin, Australia"
 msgstr "Darwin, Australie"
 
-#: alouette.py:189 alouette.py:2060 controls.py:27
+#: alouette.py:254 alouette.py:2126 controls.py:27
 msgid "Quito, Ecuador"
 msgstr "Quito, Équateur"
 
-#: alouette.py:190 alouette.py:2061 controls.py:28
+#: alouette.py:255 alouette.py:2127 controls.py:28
 msgid "South Point, Hawaiian Islands"
 msgstr "South Point, îles hawaïennes"
 
-#: alouette.py:191 alouette.py:2062 controls.py:29
+#: alouette.py:256 alouette.py:2128 controls.py:29
 msgid "Lima, Peru"
 msgstr ""
 
-#: alouette.py:192 alouette.py:2063 controls.py:30
+#: alouette.py:257 alouette.py:2129 controls.py:30
 msgid "Johannesburg, South Africa"
 msgstr "Johannesburg, Afrique du Sud"
 
-#: alouette.py:193 alouette.py:2064 controls.py:31
+#: alouette.py:258 alouette.py:2130 controls.py:31
 msgid "Kano, Nigeria"
 msgstr "Kano Nigéria"
 
-#: alouette.py:194 alouette.py:2065 controls.py:32
+#: alouette.py:259 alouette.py:2131 controls.py:32
 msgid "Tananarive, Madagascar"
 msgstr ""
 
-#: alouette.py:195 alouette.py:2066 controls.py:33
+#: alouette.py:260 alouette.py:2132 controls.py:33
 msgid "Bretigny, France"
 msgstr ""
 
-#: alouette.py:196 alouette.py:2067 controls.py:34
+#: alouette.py:261 alouette.py:2133 controls.py:34
 msgid "Singapore, Malaysia"
 msgstr "Singapour, Malaisie"
 
-#: alouette.py:197 alouette.py:2068 controls.py:35
+#: alouette.py:262 alouette.py:2134 controls.py:35
 msgid "Boulder, Colorado"
 msgstr ""
 
-#: alouette.py:198 alouette.py:2069 controls.py:36
+#: alouette.py:263 alouette.py:2135 controls.py:36
 msgid "Mojave, California"
 msgstr "Mojave, Californie"
 
-#: alouette.py:199 alouette.py:2070 controls.py:37
+#: alouette.py:264 alouette.py:2136 controls.py:37
 msgid "Kauai, Hawaii"
 msgstr ""
 
-#: alouette.py:200 alouette.py:2071 controls.py:38
+#: alouette.py:265 alouette.py:2137 controls.py:38
 msgid "Kashima, Japan"
 msgstr "Kashima, Japon"
 
-#: alouette.py:208 alouette.py:1721 alouette.py:2074 controls.py:46
+#: alouette.py:273 alouette.py:1787 alouette.py:2140 controls.py:46
 msgid "Date"
 msgstr ""
 
-#: alouette.py:209 alouette.py:1717 alouette.py:2075 controls.py:47
+#: alouette.py:274 alouette.py:1783 alouette.py:2141 controls.py:47
 msgid "Latitude"
 msgstr ""
 
-#: alouette.py:210 alouette.py:1719 alouette.py:2075 controls.py:48
+#: alouette.py:275 alouette.py:1785 alouette.py:2141 controls.py:48
 msgid "Longitude"
 msgstr ""
 
-#: alouette.py:213 alouette.py:2078 alouette.py:2082
+#: alouette.py:278 alouette.py:2144 alouette.py:2148
 msgid "Minimum frequency"
 msgstr "Fréquence minimale"
 
-#: alouette.py:214 alouette.py:1844 alouette.py:2079 alouette.py:2083
+#: alouette.py:279 alouette.py:1910 alouette.py:2145 alouette.py:2149
 msgid "Maximum depth"
 msgstr "Profondeur maximale"
 
-#: alouette.py:537
+#: alouette.py:601
 msgid "Sélectionner | Select"
 msgstr ""
 
-#: alouette.py:1327 alouette.py:1335
+#: alouette.py:1393 alouette.py:1401
 msgid "All Ionograms"
 msgstr "Tous les Ionogrammes"
 
-#: alouette.py:1340
+#: alouette.py:1406
 msgid "Ionograms per month"
 msgstr "Ionogrammes par mois"
 
-#: alouette.py:1342
+#: alouette.py:1408
 msgid "Number of Ionograms"
 msgstr "Nombre d'ionogrammes"
 
-#: alouette.py:1481
+#: alouette.py:1547
 msgid "<br>No. of Ionograms: "
 msgstr "<br>No. d'ionogrammes : "
 
-#: alouette.py:1483 alouette.py:1898
+#: alouette.py:1549 alouette.py:1964
 msgid "<br>Latitude: "
 msgstr "<br>Latitude : "
 
-#: alouette.py:1484 alouette.py:1899
+#: alouette.py:1550 alouette.py:1965
 msgid "<br>Longitude: "
 msgstr "<br>Longitude : "
 
-#: alouette.py:1693
+#: alouette.py:1759
 msgid "95% Confidence Interval"
 msgstr "Intervalle de confiance de 95%"
 
-#: alouette.py:1708
+#: alouette.py:1774
 msgid "Estimated Mean"
 msgstr ""
 
-#: alouette.py:1725
+#: alouette.py:1791
 msgid "Maximum depth [km]"
 msgstr "Profondeur maximale [km]"
 
-#: alouette.py:1727
+#: alouette.py:1793
 msgid "Minimum frequency [MHz]"
 msgstr "Fréquence minimale [MHz]"
 
-#: alouette.py:1735
+#: alouette.py:1801
 msgid "Data visualization (95 percent confidence interval)"
 msgstr "Visualisation des données (intervalle de confiance de 95%)"
 
-#: alouette.py:1834 alouette.py:2087
+#: alouette.py:1900 alouette.py:2153
 msgid "Mean"
 msgstr "Moyenne"
 
-#: alouette.py:1837 alouette.py:2088
+#: alouette.py:1903 alouette.py:2154
 msgid "Median"
 msgstr "Médianes"
 
-#: alouette.py:1841 controls.py:51
+#: alouette.py:1907 controls.py:51
 msgid "Minimum Frequency"
 msgstr "Fréquence minimale"
 
-#: alouette.py:2007
-msgid "Alouette I ionogram data"
-msgstr "Données d'ionogrammes de l'Alouette I "
-
-#: alouette.py:2008
-msgid "Learn more about Alouette"
-msgstr "En apprendre plus sur Alouette"
-
-#: alouette.py:2009
+#: alouette.py:2073
 msgid "Ionograms selected"
 msgstr "Ionogrammes sélectionnés"
 
-#: alouette.py:2009
+#: alouette.py:2073
 msgid "Total number of ionograms"
 msgstr "nombre total d'ionogrammes"
 
-#: alouette.py:2010
+#: alouette.py:2074
 msgid ""
 "Launched in 1962, Alouette I sent radio waves of different frequencies "
 "into the topmost layer of the atmosphere, known as the ionosphere, and "
@@ -270,7 +262,7 @@ msgstr ""
 " empêché l'utilisation, l’interprétation et l’analyse de ces données à "
 "une plus grande échelle."
 
-#: alouette.py:2011
+#: alouette.py:2075
 msgid ""
 "This application provides users the ability to select, download and "
 "visualize Alouette I's data. Please note that the metadata and parameters"
@@ -287,7 +279,7 @@ msgstr ""
 "erreur et ne doivent pas être utilisées directement dans un contexte "
 "scientifique."
 
-#: alouette.py:2012
+#: alouette.py:2076
 msgid ""
 "Visit our GitHub page to learn more about the [code used to make this "
 "application](https://github.com/asc-csa/AlouetteApp) and the [code used "
@@ -304,11 +296,11 @@ msgstr ""
 "de l’ASC](https://data.asc-csa.gc.ca/fr/dataset/221c1c75-4c42-4286-a4ce-"
 "ca6c3027b7fe)."
 
-#: alouette.py:2013
+#: alouette.py:2077
 msgid "Select data"
 msgstr "Sélectionner les données"
 
-#: alouette.py:2014
+#: alouette.py:2078
 msgid ""
 "Invalid values provided. Latitude values must be between -90 and 90. "
 "Longitude values must be between -180 and 180. Minimum values must be "
@@ -320,7 +312,7 @@ msgstr ""
 "valeurs minimum doivent être plus petites que les valeurs maximum. Toutes"
 " valeurs doivent être des chiffres entiers multiples de 5."
 
-#: alouette.py:2015
+#: alouette.py:2079
 msgid ""
 "Invalid dates provided. Dates must be between 29/09/1962 (Sep. 29th 1962)"
 " and 31/12/1972 (Dec. 31st 1972)."
@@ -328,51 +320,51 @@ msgstr ""
 "Dates reçues invalides. Les dates doivent être entre 29/09/1962 (29 sépt."
 " 1962) et 31/12/1972 (31 déc. 1972)."
 
-#: alouette.py:2016
+#: alouette.py:2080
 msgid "Selection of the ground stations"
 msgstr "Sélection des stations terrestes"
 
-#: alouette.py:2017
+#: alouette.py:2081
 msgid "Selection of the range of latitude "
 msgstr "Sélection de la plage de latitude"
 
-#: alouette.py:2018
+#: alouette.py:2082
 msgid "Selection of the range of longitude"
 msgstr "Sélection de la plage de longitude"
 
-#: alouette.py:2019
+#: alouette.py:2083
 msgid "Date selection"
 msgstr "Sélection de la plage de date"
 
-#: alouette.py:2020
+#: alouette.py:2084
 msgid "Download the selected dataset"
 msgstr "Télécharger le jeu de données séléctionné"
 
-#: alouette.py:2021
+#: alouette.py:2085
 msgid "Filter by ground station latitude:"
 msgstr "Filtrer par la latitude de la station:"
 
-#: alouette.py:2022
+#: alouette.py:2086
 msgid "Minimum latitude"
 msgstr "Latitude minimum"
 
-#: alouette.py:2023
+#: alouette.py:2087
 msgid "Maximum latitude"
 msgstr "Latitude maximum"
 
-#: alouette.py:2024
+#: alouette.py:2088
 msgid "Filter by ground station longitude:"
 msgstr "Filtrer par la longitude de la station:"
 
-#: alouette.py:2025
+#: alouette.py:2089
 msgid "Minimum longitude"
 msgstr "Longitude minimum"
 
-#: alouette.py:2026
+#: alouette.py:2090
 msgid "Maximum longitude"
 msgstr "Longitude maximum"
 
-#: alouette.py:2027
+#: alouette.py:2091
 msgid ""
 "Map of the world showing ground stations. Each station is represented by "
 "a circle, the size of which depends on the number of ionograms at each "
@@ -382,23 +374,23 @@ msgstr ""
 "représentée par un cercle, dont la taille dépend du nombre d'ionogrammes "
 "de chaque station"
 
-#: alouette.py:2028
+#: alouette.py:2092
 msgid "Filter by date:"
 msgstr "Filtrer par date :"
 
-#: alouette.py:2029
+#: alouette.py:2093
 msgid "Select ground stations:"
 msgstr "Sélectionner les stations :"
 
-#: alouette.py:2030
+#: alouette.py:2094
 msgid "Download summary data as CSV"
 msgstr "Télécharger la synthèse CSV"
 
-#: alouette.py:2031
+#: alouette.py:2095
 msgid "Download selected ionogram images"
 msgstr "Télécharger les ionogrammes sélectionnées"
 
-#: alouette.py:2032
+#: alouette.py:2096
 msgid ""
 "Graph showing the number of ionograms captured during each month. The "
 "X-axis indicates the date and the Y-axis indicates the number of "
@@ -408,23 +400,23 @@ msgstr ""
 "mois. L'axe des X indique la date et l'axe des Y indique le nombre "
 "d'ionogrammes."
 
-#: alouette.py:2033
+#: alouette.py:2097
 msgid "The ionogram images download is currently limited to "
 msgstr "Le téléchargement des ionogrammes est actuellement limité à "
 
-#: alouette.py:2033
+#: alouette.py:2097
 msgid " images at a time."
 msgstr " images à la fois."
 
-#: alouette.py:2034
+#: alouette.py:2098
 msgid "Select x-axis:"
 msgstr "Sélectionner l'axe des x :"
 
-#: alouette.py:2035
+#: alouette.py:2099
 msgid "Select y-axis:"
 msgstr "Sélectionner l'axe des y :"
 
-#: alouette.py:2036
+#: alouette.py:2100
 msgid ""
 "Map showing either minimum frequency or maximum depth values at each "
 "ground station. Each station is represented by a circle, the size of "
@@ -438,15 +430,23 @@ msgstr ""
 "variables sélectionnées. Explorez les données en sélectionnant "
 "différentes variables dans le menu déroulant à droite."
 
-#: alouette.py:2037
+#: alouette.py:2101
 msgid "Select statistic:"
 msgstr "Sélectionner statistique :"
 
-#: alouette.py:2038
+#: alouette.py:2102
 msgid "Select plotted value:"
 msgstr "Sélectionner la valeur tracée :"
 
-#: alouette.py:2085
+#: alouette.py:2103
+msgid "Select start date"
+msgstr "Sélectionnez la date de début"
+
+#: alouette.py:2104
+msgid "Select end date"
+msgstr "Sélectionnez la date de fin"
+
+#: alouette.py:2151
 msgid ""
 "Graph showing either the mean minimum frequency or mean maximum depth "
 "values as a function of either date, longitude, or latitude. Explore the "
@@ -795,3 +795,9 @@ msgstr "Profondeur maximale"
 #~ msgid "Estimated Mman"
 #~ msgstr "Moyenne estimée"
 
+#~ msgid "Alouette I ionogram data"
+#~ msgstr "Données d'ionogrammes de l'Alouette I "
+
+#~ msgid "Learn more about Alouette"
+#~ msgstr "En apprendre plus sur Alouette"
+
diff --git a/translations/messages.pot b/translations/messages.pot
index a4fbf96..5fceb94 100644
--- a/translations/messages.pot
+++ b/translations/messages.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2021-03-26 15:33-0300\n"
+"POT-Creation-Date: 2021-04-23 14:06-0300\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -17,231 +17,223 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Generated-By: Babel 2.8.0\n"
 
-#: alouette.py:169 alouette.py:2040 controls.py:7
+#: alouette.py:234 alouette.py:2106 controls.py:7
 msgid "Resolute Bay, No. W. Territories"
 msgstr ""
 
-#: alouette.py:170 alouette.py:2041 controls.py:8
+#: alouette.py:235 alouette.py:2107 controls.py:8
 msgid "Blossom Point, Maryland"
 msgstr ""
 
-#: alouette.py:171 alouette.py:2042 controls.py:9
+#: alouette.py:236 alouette.py:2108 controls.py:9
 msgid "South Atlantic, Falkland Islands"
 msgstr ""
 
-#: alouette.py:172 alouette.py:2043 controls.py:10
+#: alouette.py:237 alouette.py:2109 controls.py:10
 msgid "St. John's, Newfoundland"
 msgstr ""
 
-#: alouette.py:173 alouette.py:2044 controls.py:11
+#: alouette.py:238 alouette.py:2110 controls.py:11
 msgid "Orroral Valley, Australia"
 msgstr ""
 
-#: alouette.py:174 alouette.py:2045 controls.py:12
+#: alouette.py:239 alouette.py:2111 controls.py:12
 msgid "Prince Albert, Canada"
 msgstr ""
 
-#: alouette.py:175 alouette.py:2046 controls.py:13
+#: alouette.py:240 alouette.py:2112 controls.py:13
 msgid "Ottawa, Canada"
 msgstr ""
 
-#: alouette.py:176 alouette.py:2047 controls.py:14
+#: alouette.py:241 alouette.py:2113 controls.py:14
 msgid "Byrd Station, Antartica"
 msgstr ""
 
-#: alouette.py:177 alouette.py:2048 controls.py:15
+#: alouette.py:242 alouette.py:2114 controls.py:15
 msgid "Las Palmas, Canary Island"
 msgstr ""
 
-#: alouette.py:178 alouette.py:2049 controls.py:16
+#: alouette.py:243 alouette.py:2115 controls.py:16
 msgid "Winkfield, England"
 msgstr ""
 
-#: alouette.py:179 alouette.py:2050 controls.py:17
+#: alouette.py:244 alouette.py:2116 controls.py:17
 msgid "Fort Myers, Florida"
 msgstr ""
 
-#: alouette.py:180 alouette.py:2051 controls.py:18
+#: alouette.py:245 alouette.py:2117 controls.py:18
 msgid "Antofagasta, Chile"
 msgstr ""
 
-#: alouette.py:181 alouette.py:2052 controls.py:19
+#: alouette.py:246 alouette.py:2118 controls.py:19
 msgid "East Grand Forks, Minnesota"
 msgstr ""
 
-#: alouette.py:182 alouette.py:2053 controls.py:20
+#: alouette.py:247 alouette.py:2119 controls.py:20
 msgid "Rosman, No. Carolina"
 msgstr ""
 
-#: alouette.py:183 alouette.py:2054 controls.py:21
+#: alouette.py:248 alouette.py:2120 controls.py:21
 msgid "College, Fairbanks, Alaska"
 msgstr ""
 
-#: alouette.py:184 alouette.py:2055 controls.py:22
+#: alouette.py:249 alouette.py:2121 controls.py:22
 msgid "Woomera, Australia"
 msgstr ""
 
-#: alouette.py:185 alouette.py:2056 controls.py:23
+#: alouette.py:250 alouette.py:2122 controls.py:23
 msgid "Gilmore Creek, Fairbanks, Alaska"
 msgstr ""
 
-#: alouette.py:186 alouette.py:2057 controls.py:24
+#: alouette.py:251 alouette.py:2123 controls.py:24
 msgid "Tromso, Norway"
 msgstr ""
 
-#: alouette.py:187 alouette.py:2058 controls.py:25
+#: alouette.py:252 alouette.py:2124 controls.py:25
 msgid "University of Alaska, Fairbanks, Alaska"
 msgstr ""
 
-#: alouette.py:188 alouette.py:2059 controls.py:26
+#: alouette.py:253 alouette.py:2125 controls.py:26
 msgid "Darwin, Australia"
 msgstr ""
 
-#: alouette.py:189 alouette.py:2060 controls.py:27
+#: alouette.py:254 alouette.py:2126 controls.py:27
 msgid "Quito, Ecuador"
 msgstr ""
 
-#: alouette.py:190 alouette.py:2061 controls.py:28
+#: alouette.py:255 alouette.py:2127 controls.py:28
 msgid "South Point, Hawaiian Islands"
 msgstr ""
 
-#: alouette.py:191 alouette.py:2062 controls.py:29
+#: alouette.py:256 alouette.py:2128 controls.py:29
 msgid "Lima, Peru"
 msgstr ""
 
-#: alouette.py:192 alouette.py:2063 controls.py:30
+#: alouette.py:257 alouette.py:2129 controls.py:30
 msgid "Johannesburg, South Africa"
 msgstr ""
 
-#: alouette.py:193 alouette.py:2064 controls.py:31
+#: alouette.py:258 alouette.py:2130 controls.py:31
 msgid "Kano, Nigeria"
 msgstr ""
 
-#: alouette.py:194 alouette.py:2065 controls.py:32
+#: alouette.py:259 alouette.py:2131 controls.py:32
 msgid "Tananarive, Madagascar"
 msgstr ""
 
-#: alouette.py:195 alouette.py:2066 controls.py:33
+#: alouette.py:260 alouette.py:2132 controls.py:33
 msgid "Bretigny, France"
 msgstr ""
 
-#: alouette.py:196 alouette.py:2067 controls.py:34
+#: alouette.py:261 alouette.py:2133 controls.py:34
 msgid "Singapore, Malaysia"
 msgstr ""
 
-#: alouette.py:197 alouette.py:2068 controls.py:35
+#: alouette.py:262 alouette.py:2134 controls.py:35
 msgid "Boulder, Colorado"
 msgstr ""
 
-#: alouette.py:198 alouette.py:2069 controls.py:36
+#: alouette.py:263 alouette.py:2135 controls.py:36
 msgid "Mojave, California"
 msgstr ""
 
-#: alouette.py:199 alouette.py:2070 controls.py:37
+#: alouette.py:264 alouette.py:2136 controls.py:37
 msgid "Kauai, Hawaii"
 msgstr ""
 
-#: alouette.py:200 alouette.py:2071 controls.py:38
+#: alouette.py:265 alouette.py:2137 controls.py:38
 msgid "Kashima, Japan"
 msgstr ""
 
-#: alouette.py:208 alouette.py:1721 alouette.py:2074 controls.py:46
+#: alouette.py:273 alouette.py:1787 alouette.py:2140 controls.py:46
 msgid "Date"
 msgstr ""
 
-#: alouette.py:209 alouette.py:1717 alouette.py:2075 controls.py:47
+#: alouette.py:274 alouette.py:1783 alouette.py:2141 controls.py:47
 msgid "Latitude"
 msgstr ""
 
-#: alouette.py:210 alouette.py:1719 alouette.py:2075 controls.py:48
+#: alouette.py:275 alouette.py:1785 alouette.py:2141 controls.py:48
 msgid "Longitude"
 msgstr ""
 
-#: alouette.py:213 alouette.py:2078 alouette.py:2082
+#: alouette.py:278 alouette.py:2144 alouette.py:2148
 msgid "Minimum frequency"
 msgstr ""
 
-#: alouette.py:214 alouette.py:1844 alouette.py:2079 alouette.py:2083
+#: alouette.py:279 alouette.py:1910 alouette.py:2145 alouette.py:2149
 msgid "Maximum depth"
 msgstr ""
 
-#: alouette.py:537
+#: alouette.py:601
 msgid "Sélectionner | Select"
 msgstr ""
 
-#: alouette.py:1327 alouette.py:1335
+#: alouette.py:1393 alouette.py:1401
 msgid "All Ionograms"
 msgstr ""
 
-#: alouette.py:1340
+#: alouette.py:1406
 msgid "Ionograms per month"
 msgstr ""
 
-#: alouette.py:1342
+#: alouette.py:1408
 msgid "Number of Ionograms"
 msgstr ""
 
-#: alouette.py:1481
+#: alouette.py:1547
 msgid "<br>No. of Ionograms: "
 msgstr ""
 
-#: alouette.py:1483 alouette.py:1898
+#: alouette.py:1549 alouette.py:1964
 msgid "<br>Latitude: "
 msgstr ""
 
-#: alouette.py:1484 alouette.py:1899
+#: alouette.py:1550 alouette.py:1965
 msgid "<br>Longitude: "
 msgstr ""
 
-#: alouette.py:1693
+#: alouette.py:1759
 msgid "95% Confidence Interval"
 msgstr ""
 
-#: alouette.py:1708
+#: alouette.py:1774
 msgid "Estimated Mean"
 msgstr ""
 
-#: alouette.py:1725
+#: alouette.py:1791
 msgid "Maximum depth [km]"
 msgstr ""
 
-#: alouette.py:1727
+#: alouette.py:1793
 msgid "Minimum frequency [MHz]"
 msgstr ""
 
-#: alouette.py:1735
+#: alouette.py:1801
 msgid "Data visualization (95 percent confidence interval)"
 msgstr ""
 
-#: alouette.py:1834 alouette.py:2087
+#: alouette.py:1900 alouette.py:2153
 msgid "Mean"
 msgstr ""
 
-#: alouette.py:1837 alouette.py:2088
+#: alouette.py:1903 alouette.py:2154
 msgid "Median"
 msgstr ""
 
-#: alouette.py:1841 controls.py:51
+#: alouette.py:1907 controls.py:51
 msgid "Minimum Frequency"
 msgstr ""
 
-#: alouette.py:2007
-msgid "Alouette I ionogram data"
-msgstr ""
-
-#: alouette.py:2008
-msgid "Learn more about Alouette"
-msgstr ""
-
-#: alouette.py:2009
+#: alouette.py:2073
 msgid "Ionograms selected"
 msgstr ""
 
-#: alouette.py:2009
+#: alouette.py:2073
 msgid "Total number of ionograms"
 msgstr ""
 
-#: alouette.py:2010
+#: alouette.py:2074
 msgid ""
 "Launched in 1962, Alouette I sent radio waves of different frequencies "
 "into the topmost layer of the atmosphere, known as the ionosphere, and "
@@ -256,7 +248,7 @@ msgid ""
 "analysis on a larger scale."
 msgstr ""
 
-#: alouette.py:2011
+#: alouette.py:2075
 msgid ""
 "This application provides users the ability to select, download and "
 "visualize Alouette I's data. Please note that the metadata and parameters"
@@ -266,7 +258,7 @@ msgid ""
 "and should not be directly used in a scientific context."
 msgstr ""
 
-#: alouette.py:2012
+#: alouette.py:2076
 msgid ""
 "Visit our GitHub page to learn more about the [code used to make this "
 "application](https://github.com/asc-csa/AlouetteApp) and the [code used "
@@ -276,11 +268,11 @@ msgid ""
 "csa.gc.ca/en/dataset/221c1c75-4c42-4286-a4ce-ca6c3027b7fe)"
 msgstr ""
 
-#: alouette.py:2013
+#: alouette.py:2077
 msgid "Select data"
 msgstr ""
 
-#: alouette.py:2014
+#: alouette.py:2078
 msgid ""
 "Invalid values provided. Latitude values must be between -90 and 90. "
 "Longitude values must be between -180 and 180. Minimum values must be "
@@ -288,103 +280,103 @@ msgid ""
 "multiples of 5."
 msgstr ""
 
-#: alouette.py:2015
+#: alouette.py:2079
 msgid ""
 "Invalid dates provided. Dates must be between 29/09/1962 (Sep. 29th 1962)"
 " and 31/12/1972 (Dec. 31st 1972)."
 msgstr ""
 
-#: alouette.py:2016
+#: alouette.py:2080
 msgid "Selection of the ground stations"
 msgstr ""
 
-#: alouette.py:2017
+#: alouette.py:2081
 msgid "Selection of the range of latitude "
 msgstr ""
 
-#: alouette.py:2018
+#: alouette.py:2082
 msgid "Selection of the range of longitude"
 msgstr ""
 
-#: alouette.py:2019
+#: alouette.py:2083
 msgid "Date selection"
 msgstr ""
 
-#: alouette.py:2020
+#: alouette.py:2084
 msgid "Download the selected dataset"
 msgstr ""
 
-#: alouette.py:2021
+#: alouette.py:2085
 msgid "Filter by ground station latitude:"
 msgstr ""
 
-#: alouette.py:2022
+#: alouette.py:2086
 msgid "Minimum latitude"
 msgstr ""
 
-#: alouette.py:2023
+#: alouette.py:2087
 msgid "Maximum latitude"
 msgstr ""
 
-#: alouette.py:2024
+#: alouette.py:2088
 msgid "Filter by ground station longitude:"
 msgstr ""
 
-#: alouette.py:2025
+#: alouette.py:2089
 msgid "Minimum longitude"
 msgstr ""
 
-#: alouette.py:2026
+#: alouette.py:2090
 msgid "Maximum longitude"
 msgstr ""
 
-#: alouette.py:2027
+#: alouette.py:2091
 msgid ""
 "Map of the world showing ground stations. Each station is represented by "
 "a circle, the size of which depends on the number of ionograms at each "
 "station."
 msgstr ""
 
-#: alouette.py:2028
+#: alouette.py:2092
 msgid "Filter by date:"
 msgstr ""
 
-#: alouette.py:2029
+#: alouette.py:2093
 msgid "Select ground stations:"
 msgstr ""
 
-#: alouette.py:2030
+#: alouette.py:2094
 msgid "Download summary data as CSV"
 msgstr ""
 
-#: alouette.py:2031
+#: alouette.py:2095
 msgid "Download selected ionogram images"
 msgstr ""
 
-#: alouette.py:2032
+#: alouette.py:2096
 msgid ""
 "Graph showing the number of ionograms captured during each month. The "
 "X-axis indicates the date and the Y-axis indicates the number of "
 "ionograms."
 msgstr ""
 
-#: alouette.py:2033
+#: alouette.py:2097
 msgid "The ionogram images download is currently limited to "
 msgstr ""
 
-#: alouette.py:2033
+#: alouette.py:2097
 msgid " images at a time."
 msgstr ""
 
-#: alouette.py:2034
+#: alouette.py:2098
 msgid "Select x-axis:"
 msgstr ""
 
-#: alouette.py:2035
+#: alouette.py:2099
 msgid "Select y-axis:"
 msgstr ""
 
-#: alouette.py:2036
+#: alouette.py:2100
 msgid ""
 "Map showing either minimum frequency or maximum depth values at each "
 "ground station. Each station is represented by a circle, the size of "
@@ -393,15 +385,23 @@ msgid ""
 "down menu on the right."
 msgstr ""
 
-#: alouette.py:2037
+#: alouette.py:2101
 msgid "Select statistic:"
 msgstr ""
 
-#: alouette.py:2038
+#: alouette.py:2102
 msgid "Select plotted value:"
 msgstr ""
 
-#: alouette.py:2085
+#: alouette.py:2103
+msgid "Select start date"
+msgstr ""
+
+#: alouette.py:2104
+msgid "Select end date"
+msgstr ""
+
+#: alouette.py:2151
 msgid ""
 "Graph showing either the mean minimum frequency or mean maximum depth "
 "values as a function of either date, longitude, or latitude. Explore the "