diff --git a/src/utils/dateTime.ts b/src/utils/dateTime.ts
index d040e3b81..2ee6a482d 100644
--- a/src/utils/dateTime.ts
+++ b/src/utils/dateTime.ts
@@ -138,6 +138,3 @@ export const formatEstimate = (estimate: { date: string; q?: string; y: string }
 
     return date === createLocaleDate(endOfQuarter(q), { locale }) ? `${q}/${y}` : date;
 };
-
-export const convertDateByLocale = (date: string | Date, locale: TLocale) =>
-    createLocaleDate(parseLocaleDate(date, { locale }), { locale });
diff --git a/trpc/router/goal.ts b/trpc/router/goal.ts
index 33f23d4be..762e68a48 100644
--- a/trpc/router/goal.ts
+++ b/trpc/router/goal.ts
@@ -42,7 +42,7 @@ import {
     updateCriteriaState,
 } from '../../src/schema/criteria';
 import type { FieldDiff } from '../../src/types/common';
-import { convertDateByLocale, createLocaleDate } from '../../src/utils/dateTime';
+import { parseLocaleDate } from '../../src/utils/dateTime';
 
 import { addCalculatedProjectFields } from './project';
 
@@ -454,7 +454,7 @@ export const goal = router({
     }),
     update: protectedProcedure.input(goalUpdateSchema).mutation(async ({ ctx, input }) => {
         if (input.estimate && input.estimate.date) {
-            input.estimate.date = convertDateByLocale(input.estimate.date, 'en');
+            input.estimate.date = parseLocaleDate(input.estimate.date, { locale: 'en' }).toISOString();
         }
 
         const actualGoal = await prisma.goal.findUnique({
@@ -562,10 +562,10 @@ export const goal = router({
             // FIXME: https://github.com/taskany-inc/issues/issues/1359
             updatedFields.estimate = [
                 previousEstimate?.estimate.date
-                    ? convertDateByLocale(previousEstimate?.estimate.date, 'en')
+                    ? parseLocaleDate(previousEstimate?.estimate.date, { locale: 'en' }).toISOString()
                     : [previousEstimate?.estimate.q, previousEstimate?.estimate.y].join('/'),
                 correctEstimate.date
-                    ? convertDateByLocale(correctEstimate.date, 'en')
+                    ? parseLocaleDate(correctEstimate.date, { locale: 'en' }).toISOString()
                     : [correctEstimate.q, correctEstimate.y].join('/'),
             ];
         }