diff --git a/projects/core/components/primitive-calendar/primitive-calendar.component.ts b/projects/core/components/primitive-calendar/primitive-calendar.component.ts
index 30e3db1c18c1..b8d7b34b5c6a 100644
--- a/projects/core/components/primitive-calendar/primitive-calendar.component.ts
+++ b/projects/core/components/primitive-calendar/primitive-calendar.component.ts
@@ -116,11 +116,11 @@ export class TuiPrimitiveCalendarComponent {
         }
 
         if (value instanceof TuiDay) {
-            return value.daySame(item) ? TuiRangeState.Single : null;
+            return value.daySame(item) ? 'single' : null;
         }
 
         if (!(value instanceof TuiDayRange)) {
-            return value.find(day => day.daySame(item)) ? TuiRangeState.Single : null;
+            return value.find(day => day.daySame(item)) ? 'single' : null;
         }
 
         if (
@@ -132,7 +132,7 @@ export class TuiPrimitiveCalendarComponent {
                 hoveredItem.dayBefore(value.from) &&
                 value.isSingleDay)
         ) {
-            return TuiRangeState.Start;
+            return 'start';
         }
 
         if (
@@ -144,12 +144,10 @@ export class TuiPrimitiveCalendarComponent {
                 hoveredItem.dayAfter(value.from) &&
                 value.isSingleDay)
         ) {
-            return TuiRangeState.End;
+            return 'end';
         }
 
-        return value.isSingleDay && value.from.daySame(item)
-            ? TuiRangeState.Single
-            : null;
+        return value.isSingleDay && value.from.daySame(item) ? 'single' : null;
     }
 
     itemIsToday(item: TuiDay): boolean {
diff --git a/projects/core/components/primitive-calendar/test/primitive-calendar.component.spec.ts b/projects/core/components/primitive-calendar/test/primitive-calendar.component.spec.ts
index e4d339717bd5..9e2d18d72e3c 100644
--- a/projects/core/components/primitive-calendar/test/primitive-calendar.component.spec.ts
+++ b/projects/core/components/primitive-calendar/test/primitive-calendar.component.spec.ts
@@ -14,7 +14,6 @@ import {
     TuiInteractiveState,
     TuiPrimitiveCalendarComponent,
     TuiPrimitiveCalendarModule,
-    TuiRangeState,
 } from '@taiga-ui/core';
 import {TUI_FIRST_DAY_OF_WEEK} from '@taiga-ui/core/tokens';
 import {tuiMockCurrentDate, tuiRestoreRealDate} from '@taiga-ui/testing';
@@ -156,7 +155,7 @@ describe('PrimitiveCalendar', () => {
 
                 component.value = range;
 
-                expect(component.getItemRange(day1)).toBe(TuiRangeState.Start);
+                expect(component.getItemRange(day1)).toBe('start');
             });
 
             it('returns end correctly if there is range in value', () => {
@@ -166,7 +165,7 @@ describe('PrimitiveCalendar', () => {
 
                 component.value = range;
 
-                expect(component.getItemRange(day2)).toBe(TuiRangeState.End);
+                expect(component.getItemRange(day2)).toBe('end');
             });
 
             it('returns single if value is single day and item equals this', () => {
@@ -175,7 +174,7 @@ describe('PrimitiveCalendar', () => {
 
                 component.value = range;
 
-                expect(component.getItemRange(day1)).toBe(TuiRangeState.Single);
+                expect(component.getItemRange(day1)).toBe('single');
             });
         });
 
diff --git a/projects/core/components/primitive-year-picker/primitive-year-picker.component.ts b/projects/core/components/primitive-year-picker/primitive-year-picker.component.ts
index 9359d582b7af..49a10cdee534 100644
--- a/projects/core/components/primitive-year-picker/primitive-year-picker.component.ts
+++ b/projects/core/components/primitive-year-picker/primitive-year-picker.component.ts
@@ -127,11 +127,11 @@ export class TuiPrimitiveYearPickerComponent {
         }
 
         if (value instanceof TuiYear) {
-            return value.year === item ? TuiRangeState.Single : null;
+            return value.year === item ? 'single' : null;
         }
 
         if (!(value instanceof TuiMonthRange)) {
-            return value.find(day => day.year === item) ? TuiRangeState.Single : null;
+            return value.find(day => day.year === item) ? 'single' : null;
         }
 
         if (
@@ -145,7 +145,7 @@ export class TuiPrimitiveYearPickerComponent {
                 hoveredItem < value.from.year &&
                 value.from.yearSame(value.to))
         ) {
-            return TuiRangeState.Start;
+            return 'start';
         }
 
         if (
@@ -159,11 +159,11 @@ export class TuiPrimitiveYearPickerComponent {
                 hoveredItem > value.from.year &&
                 value.from.yearSame(value.to))
         ) {
-            return TuiRangeState.End;
+            return 'end';
         }
 
         return value.from.yearSame(value.to) && value.from.year === item
-            ? TuiRangeState.Single
+            ? 'single'
             : null;
     }
 
diff --git a/projects/core/components/primitive-year-picker/test/primitive-year-picker.component.spec.ts b/projects/core/components/primitive-year-picker/test/primitive-year-picker.component.spec.ts
index 47f015fe5433..462f83a5c67a 100644
--- a/projects/core/components/primitive-year-picker/test/primitive-year-picker.component.spec.ts
+++ b/projects/core/components/primitive-year-picker/test/primitive-year-picker.component.spec.ts
@@ -5,7 +5,6 @@ import {
     TuiInteractiveState,
     TuiPrimitiveYearPickerComponent,
     TuiPrimitiveYearPickerModule,
-    TuiRangeState,
 } from '@taiga-ui/core';
 import {TuiPageObject} from '@taiga-ui/testing';
 
@@ -104,7 +103,7 @@ describe('TuiPrimitiveYearPickerComponent', () => {
                 new TuiDay(2020, 1, 1),
             );
 
-            expect(component.getItemRange(item)).toBe(TuiRangeState.Start);
+            expect(component.getItemRange(item)).toBe('start');
         });
 
         it('returns end correctly', () => {
@@ -115,7 +114,7 @@ describe('TuiPrimitiveYearPickerComponent', () => {
                 new TuiDay(item, 1, 1),
             );
 
-            expect(component.getItemRange(item)).toBe(TuiRangeState.End);
+            expect(component.getItemRange(item)).toBe('end');
         });
 
         it('returns single correctly', () => {
@@ -126,7 +125,7 @@ describe('TuiPrimitiveYearPickerComponent', () => {
                 new TuiDay(item, 2, 2),
             );
 
-            expect(component.getItemRange(item)).toBe(TuiRangeState.Single);
+            expect(component.getItemRange(item)).toBe('single');
         });
     });
 
diff --git a/projects/core/enums/range-state.ts b/projects/core/enums/range-state.ts
index 78fe6df7f065..2d196f02d376 100644
--- a/projects/core/enums/range-state.ts
+++ b/projects/core/enums/range-state.ts
@@ -1,10 +1,4 @@
 /**
  * @internal used in calendar and year picker
  */
-// TODO: change type in v4.0
-// eslint-disable-next-line no-restricted-syntax
-export enum TuiRangeState {
-    End = 'end',
-    Single = 'single',
-    Start = 'start',
-}
+export type TuiRangeState = 'end' | 'single' | 'start';
diff --git a/projects/kit/components/calendar-month/calendar-month.component.ts b/projects/kit/components/calendar-month/calendar-month.component.ts
index abf760d4a757..ff3d8fc016f1 100644
--- a/projects/kit/components/calendar-month/calendar-month.component.ts
+++ b/projects/kit/components/calendar-month/calendar-month.component.ts
@@ -118,7 +118,7 @@ export class TuiCalendarMonthComponent implements TuiWithOptionalMinMax<TuiMonth
         }
 
         if (value instanceof TuiMonth) {
-            return value.monthSame(item) ? TuiRangeState.Single : null;
+            return value.monthSame(item) ? 'single' : null;
         }
 
         const theFirstOfRange = value.from.monthSame(item) && !value.isSingleMonth;
@@ -132,7 +132,7 @@ export class TuiCalendarMonthComponent implements TuiWithOptionalMinMax<TuiMonth
             value.isSingleMonth;
 
         if (theFirstOfRange || hoveredItemAfterFrom || hoveredItemIsCandidateToBeFrom) {
-            return TuiRangeState.Start;
+            return 'start';
         }
 
         const theLastOfRange = value.to.monthSame(item) && !value.isSingleMonth;
@@ -146,12 +146,10 @@ export class TuiCalendarMonthComponent implements TuiWithOptionalMinMax<TuiMonth
             value.isSingleMonth;
 
         if (theLastOfRange || hoveredItemBeforeTo || hoveredItemIsCandidateToBeTo) {
-            return TuiRangeState.End;
+            return 'end';
         }
 
-        return value.isSingleMonth && value.from.monthSame(item)
-            ? TuiRangeState.Single
-            : null;
+        return value.isSingleMonth && value.from.monthSame(item) ? 'single' : null;
     }
 
     getTuiMonth(monthNumber: number, yearNumber: number): TuiMonth {
diff --git a/projects/kit/components/calendar-month/test/calendar-month.component.spec.ts b/projects/kit/components/calendar-month/test/calendar-month.component.spec.ts
index 00faef367ff8..9d3fa35ca351 100644
--- a/projects/kit/components/calendar-month/test/calendar-month.component.spec.ts
+++ b/projects/kit/components/calendar-month/test/calendar-month.component.spec.ts
@@ -1,7 +1,7 @@
 import {Component, ViewChild} from '@angular/core';
 import {ComponentFixture, TestBed} from '@angular/core/testing';
 import {TuiDay, TuiMonth, TuiMonthRange, TuiYear} from '@taiga-ui/cdk';
-import {TuiInteractiveState, TuiRangeState} from '@taiga-ui/core';
+import {TuiInteractiveState} from '@taiga-ui/core';
 import {TuiCalendarMonthComponent, TuiCalendarMonthModule} from '@taiga-ui/kit';
 
 const TODAY = TuiDay.currentLocal();
@@ -165,7 +165,7 @@ describe('CalendarMonth', () => {
 
             component.value = month;
 
-            expect(component.getItemRange(month)).toBe(TuiRangeState.Single);
+            expect(component.getItemRange(month)).toBe('single');
         });
 
         it('returns start if item is start of range', () => {
@@ -173,7 +173,7 @@ describe('CalendarMonth', () => {
 
             component.value = new TuiMonthRange(month, month.append({month: 2}));
 
-            expect(component.getItemRange(month)).toBe(TuiRangeState.Start);
+            expect(component.getItemRange(month)).toBe('start');
         });
 
         it('returns end if item is start of range', () => {
@@ -181,7 +181,7 @@ describe('CalendarMonth', () => {
 
             component.value = new TuiMonthRange(month.append({month: -2}), month);
 
-            expect(component.getItemRange(month)).toBe(TuiRangeState.End);
+            expect(component.getItemRange(month)).toBe('end');
         });
 
         it('returns end if hovered item before item', () => {
@@ -190,7 +190,7 @@ describe('CalendarMonth', () => {
             component.value = new TuiMonthRange(month, month);
             component.hoveredItem = new TuiMonth(TODAY.year, 4);
 
-            expect(component.getItemRange(month)).toBe(TuiRangeState.End);
+            expect(component.getItemRange(month)).toBe('end');
         });
     });