diff --git a/apps/web/components/orders/order-form/datetime-select.tsx b/apps/web/components/orders/order-form/datetime-select.tsx
index 8e2befb..7411206 100644
--- a/apps/web/components/orders/order-form/datetime-select.tsx
+++ b/apps/web/components/orders/order-form/datetime-select.tsx
@@ -4,6 +4,7 @@ import { useAvailableTimeSlotsQuery } from '@/hooks/api/slots';
 import { useOrderStore } from '@/stores/order';
 import { Button } from '@repo/ui/components/ui/button';
 import { Calendar } from '@repo/ui/components/ui/calendar';
+import { formatDate } from '@repo/utils/datetime-format';
 import dayjs from 'dayjs';
 
 export function DateSelect() {
@@ -47,7 +48,7 @@ export function TimeSelect() {
     {
       filters: {
         date: {
-          eq: date,
+          eq: formatDate(date).db(),
         },
         master: {
           documentId: {
diff --git a/apps/web/components/orders/order-form/submit-button.tsx b/apps/web/components/orders/order-form/submit-button.tsx
index 464fafb..94b399b 100644
--- a/apps/web/components/orders/order-form/submit-button.tsx
+++ b/apps/web/components/orders/order-form/submit-button.tsx
@@ -4,6 +4,7 @@ import { useOrderCreate } from '@/hooks/api/orders';
 import { useOrderStore } from '@/stores/order';
 import { Button } from '@repo/ui/components/ui/button';
 import { LoadingSpinner } from '@repo/ui/components/ui/spinner';
+import { formatDate, formatTime } from '@repo/utils/datetime-format';
 import { useEffect } from 'react';
 
 export function SubmitButton() {
@@ -18,10 +19,10 @@ export function SubmitButton() {
     createOrder({
       input: {
         client: clientId,
-        date,
+        date: formatDate(date).db(),
         services: [serviceId],
         slot: slotId,
-        time_start: time,
+        time_start: formatTime(time).db(),
       },
     });
   };
diff --git a/apps/web/components/orders/orders-list/index.tsx b/apps/web/components/orders/orders-list/index.tsx
index 27c66e6..305c861 100644
--- a/apps/web/components/orders/orders-list/index.tsx
+++ b/apps/web/components/orders/orders-list/index.tsx
@@ -6,6 +6,7 @@ import { useCustomerQuery } from '@/hooks/api/customers';
 import { useOrdersQuery } from '@/hooks/api/orders';
 import { useDateTimeStore } from '@/stores/datetime';
 import { Enum_Customer_Role } from '@repo/graphql/types';
+import { formatDate } from '@repo/utils/datetime-format';
 
 export function ClientsOrdersList() {
   const { data: { customer } = {} } = useCustomerQuery();
@@ -19,7 +20,7 @@ export function ClientsOrdersList() {
       filters: {
         slot: {
           date: {
-            eq: selectedDate,
+            eq: formatDate(selectedDate).db(),
           },
           master: {
             documentId: {
@@ -57,7 +58,7 @@ export function OrdersList() {
         },
         slot: {
           date: {
-            eq: selectedDate,
+            eq: formatDate(selectedDate).db(),
           },
         },
       },
diff --git a/apps/web/components/schedule/day-slots-list/day-slot-add-form.tsx b/apps/web/components/schedule/day-slots-list/day-slot-add-form.tsx
index cb74176..62c0161 100644
--- a/apps/web/components/schedule/day-slots-list/day-slot-add-form.tsx
+++ b/apps/web/components/schedule/day-slots-list/day-slot-add-form.tsx
@@ -8,6 +8,7 @@ import { ScheduleStoreProvider, useScheduleStore } from '@/stores/schedule';
 import { withContext } from '@/utils/context';
 import { Enum_Slot_State } from '@repo/graphql/types';
 import { Button } from '@repo/ui/components/ui/button';
+import { formatDate, formatTime } from '@repo/utils/datetime-format';
 import { PlusSquare } from 'lucide-react';
 import { type FormEvent } from 'react';
 
@@ -24,10 +25,10 @@ export const DaySlotAddForm = withContext(ScheduleStoreProvider)(function () {
     if (startTime && endTime) {
       addSlot({
         input: {
-          date: selectedDate,
+          date: formatDate(selectedDate).db(),
           state: Enum_Slot_State.Open,
-          time_end: endTime,
-          time_start: startTime,
+          time_end: formatTime(endTime).db(),
+          time_start: formatTime(startTime).db(),
         },
       });
 
diff --git a/apps/web/components/schedule/day-slots-list/index.tsx b/apps/web/components/schedule/day-slots-list/index.tsx
index 9e24619..1485cc8 100644
--- a/apps/web/components/schedule/day-slots-list/index.tsx
+++ b/apps/web/components/schedule/day-slots-list/index.tsx
@@ -5,12 +5,13 @@ import { SlotCard } from './slot-card';
 import { useSlotsQuery } from '@/hooks/api/slots';
 import { useDateTimeStore } from '@/stores/datetime';
 import { LoadingSpinner } from '@repo/ui/components/ui/spinner';
+import { formatDate } from '@repo/utils/datetime-format';
 
 export function DaySlotsList() {
   const selectedDate = useDateTimeStore((store) => store.date);
 
   const { data: { slots } = {}, isLoading } = useSlotsQuery({
-    filters: { date: { eq: selectedDate } },
+    filters: { date: { eq: formatDate(selectedDate).db() } },
   });
 
   if (isLoading) return <LoadingSpinner />;
diff --git a/apps/web/components/schedule/slot-datetime/slot-date.tsx b/apps/web/components/schedule/slot-datetime/slot-date.tsx
index d967f69..996e594 100644
--- a/apps/web/components/schedule/slot-datetime/slot-date.tsx
+++ b/apps/web/components/schedule/slot-datetime/slot-date.tsx
@@ -2,7 +2,7 @@
 
 import { type SlotComponentProps } from '../types';
 import { useSlotQuery } from '@/hooks/api/slots';
-import { formatDate } from '@repo/graphql/utils/datetime-format';
+import { formatDate } from '@repo/utils/datetime-format';
 
 export function SlotDate({ documentId }: Readonly<SlotComponentProps>) {
   const { data: { slot } = {} } = useSlotQuery({ documentId });
diff --git a/apps/web/components/schedule/slot-datetime/slot-time.tsx b/apps/web/components/schedule/slot-datetime/slot-time.tsx
index aac8b15..fb585c4 100644
--- a/apps/web/components/schedule/slot-datetime/slot-time.tsx
+++ b/apps/web/components/schedule/slot-datetime/slot-time.tsx
@@ -6,6 +6,7 @@ import { EditableTimeRangeForm, ReadonlyTimeRange } from '@/components/shared/ti
 import { useSlotMutation, useSlotQuery } from '@/hooks/api/slots';
 import { useScheduleStore } from '@/stores/schedule';
 import { Button } from '@repo/ui/components/ui/button';
+import { formatTime } from '@repo/utils/datetime-format';
 import { PencilLine } from 'lucide-react';
 import { useEffect } from 'react';
 
@@ -32,7 +33,9 @@ function SlotTimeEditForm({ documentId }: Readonly<SlotComponentProps>) {
   }, [editMode, setEndTime, setStartTime, slot]);
 
   function handleSubmit() {
-    updateSlot({ data: { time_end: endTime, time_start: startTime } });
+    updateSlot({
+      data: { time_end: formatTime(endTime).db(), time_start: formatTime(startTime).db() },
+    });
     resetTime();
     setEditMode(false);
   }
diff --git a/apps/web/components/shared/time-range/readonly.tsx b/apps/web/components/shared/time-range/readonly.tsx
index be11032..4aecf6f 100644
--- a/apps/web/components/shared/time-range/readonly.tsx
+++ b/apps/web/components/shared/time-range/readonly.tsx
@@ -1,5 +1,5 @@
-import { formatTime } from '@repo/graphql/utils/datetime-format';
 import { cn } from '@repo/ui/lib/utils';
+import { formatTime } from '@repo/utils/datetime-format';
 
 type TimeRangeProps = {
   readonly className?: string;
diff --git a/apps/web/package.json b/apps/web/package.json
index 86df62d..b008e96 100644
--- a/apps/web/package.json
+++ b/apps/web/package.json
@@ -15,6 +15,7 @@
   },
   "dependencies": {
     "@repo/ui": "workspace:*",
+    "@repo/utils": "workspace:",
     "@tanstack/react-query": "^5.64.1",
     "@telegram-apps/sdk-react": "^2.0.19",
     "dayjs": "catalog:",
diff --git a/packages/graphql/api/orders.ts b/packages/graphql/api/orders.ts
index a6a3a1e..f6fccbb 100644
--- a/packages/graphql/api/orders.ts
+++ b/packages/graphql/api/orders.ts
@@ -2,12 +2,12 @@
 import { getClientWithToken } from '../apollo/client';
 import * as GQL from '../types';
 import { Enum_Customer_Role, Enum_Slot_State } from '../types';
-import { formatDate, formatTime, sumTime } from '../utils/datetime-format';
 import { BaseService } from './base';
 import { CustomersService } from './customers';
 import { ServicesService } from './services';
 import { SlotsService } from './slots';
 import { type VariablesOf } from '@graphql-typed-document-node/core';
+import { formatTime, sumTime } from '@repo/utils/datetime-format';
 
 const ERRORS = {
   INVALID_CLIENT: 'Invalid client',
@@ -48,6 +48,7 @@ export class OrdersService extends BaseService {
       }
 
       const masters = await customersService.getMasters(this.customer);
+
       const masterId = slot?.master?.documentId;
       if (!masters.customers.some((master) => master?.documentId === masterId)) {
         throw new Error(ERRORS.INVALID_MASTER);
@@ -68,17 +69,17 @@ export class OrdersService extends BaseService {
     if (!service?.duration) throw new Error(ERRORS.INVALID_SERVICE_DURATION);
 
     const endTime = sumTime(variables.input.time_start, service?.duration);
+
     const { mutate } = await getClientWithToken();
+
     const mutationResult = await mutate({
       mutation: GQL.CreateOrderDocument,
       variables: {
         input: {
           client: variables.input.client,
-          date: formatDate(variables.input.date).db(),
           services: variables.input.services,
           slot: variables.input.slot,
           time_end: formatTime(endTime).db(),
-          time_start: formatTime(variables.input.time_start).db(),
         },
       },
     });
@@ -105,16 +106,7 @@ export class OrdersService extends BaseService {
 
     const result = await query({
       query: GQL.GetOrdersDocument,
-      variables: {
-        filters: {
-          ...variables.filters,
-          date: { eq: formatDate(variables?.filters?.date?.eq).db() },
-          slot: {
-            ...variables.filters?.slot,
-            date: { eq: formatDate(variables?.filters?.slot?.date?.eq).db() },
-          },
-        },
-      },
+      variables,
     });
 
     return result.data;
diff --git a/packages/graphql/api/slots.ts b/packages/graphql/api/slots.ts
index f6a33f4..79369e0 100644
--- a/packages/graphql/api/slots.ts
+++ b/packages/graphql/api/slots.ts
@@ -1,10 +1,10 @@
 import { getClientWithToken } from '../apollo/client';
 import * as GQL from '../types';
-import { formatDate, formatTime, getMinutes } from '../utils/datetime-format';
 import { BaseService } from './base';
 import { CustomersService } from './customers';
 import { ServicesService } from './services';
 import { type VariablesOf } from '@graphql-typed-document-node/core';
+import { getMinutes } from '@repo/utils/datetime-format';
 import dayjs from 'dayjs';
 
 export class SlotsService extends BaseService {
@@ -21,10 +21,7 @@ export class SlotsService extends BaseService {
         ...variables,
         input: {
           ...variables.input,
-          date: formatDate(variables.input.date).db(),
           master: customer?.documentId,
-          time_end: variables.input.time_end && formatTime(variables.input.time_end).db(),
-          time_start: variables.input.time_start && formatTime(variables.input.time_start).db(),
         },
       },
     });
@@ -60,7 +57,6 @@ export class SlotsService extends BaseService {
       variables: {
         filters: {
           ...variables.filters,
-          date: { eq: formatDate(variables?.filters?.date?.eq).db() },
           state: { eq: GQL.Enum_Slot_State.Open },
         },
       },
@@ -127,12 +123,7 @@ export class SlotsService extends BaseService {
 
     const result = await query({
       query: GQL.GetSlotsDocument,
-      variables: {
-        filters: {
-          ...variables.filters,
-          date: { eq: formatDate(variables?.filters?.date?.eq).db() },
-        },
-      },
+      variables,
     });
 
     return result.data;
@@ -143,17 +134,7 @@ export class SlotsService extends BaseService {
 
     const mutationResult = await mutate({
       mutation: GQL.UpdateSlotDocument,
-      variables: {
-        ...variables,
-        data: {
-          ...variables.data,
-          date: variables.data?.date ? formatDate(variables.data.date).db() : undefined,
-          time_end: variables.data?.time_end ? formatTime(variables.data.time_end).db() : undefined,
-          time_start: variables.data?.time_start
-            ? formatTime(variables.data.time_start).db()
-            : undefined,
-        },
-      },
+      variables,
     });
 
     const error = mutationResult.errors?.at(0);
diff --git a/packages/graphql/package.json b/packages/graphql/package.json
index 796dd06..c7708f9 100644
--- a/packages/graphql/package.json
+++ b/packages/graphql/package.json
@@ -9,6 +9,7 @@
   },
   "dependencies": {
     "@apollo/client": "catalog:",
+    "@repo/utils": "workspace:",
     "dayjs": "catalog:",
     "jsonwebtoken": "catalog:",
     "radashi": "catalog:",
diff --git a/packages/utils/eslint.config.js b/packages/utils/eslint.config.js
new file mode 100644
index 0000000..3fb0644
--- /dev/null
+++ b/packages/utils/eslint.config.js
@@ -0,0 +1,9 @@
+import { typescript } from '@repo/eslint-config/typescript';
+
+/** @type {import("eslint").Linter.Config} */
+export default [
+  ...typescript,
+  {
+    ignores: ['**/types/**'],
+  },
+];
diff --git a/packages/utils/package.json b/packages/utils/package.json
new file mode 100644
index 0000000..9c2a5b7
--- /dev/null
+++ b/packages/utils/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "@repo/utils",
+  "version": "0.0.0",
+  "license": "MIT",
+  "type": "module",
+  "scripts": {
+    "test:unit": "vitest"
+  },
+  "exports": {
+    "./datetime-format": "./src/datetime-format.ts"
+  },
+  "dependencies": {
+    "dayjs": "catalog:",
+    "radashi": "catalog:",
+    "zod": "catalog:"
+  },
+  "devDependencies": {
+    "@repo/eslint-config": "workspace:*",
+    "@repo/typescript-config": "workspace:*",
+    "vite-tsconfig-paths": "catalog:",
+    "vitest": "catalog:"
+  }
+}
diff --git a/packages/graphql/utils/datetime-format.ts b/packages/utils/src/datetime-format.ts
similarity index 100%
rename from packages/graphql/utils/datetime-format.ts
rename to packages/utils/src/datetime-format.ts
diff --git a/packages/utils/tsconfig.json b/packages/utils/tsconfig.json
new file mode 100644
index 0000000..c106372
--- /dev/null
+++ b/packages/utils/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "extends": "@repo/typescript-config/base.json",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["./*"]
+    },
+    "moduleResolution": "bundler",
+    "module": "ES2022"
+  },
+  "include": ["."],
+  "exclude": ["dist", "build", "node_modules"]
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 71e50bf..14a8d1e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -147,6 +147,9 @@ importers:
       '@repo/ui':
         specifier: workspace:*
         version: link:../../packages/ui
+      '@repo/utils':
+        specifier: 'workspace:'
+        version: link:../../packages/utils
       '@tanstack/react-query':
         specifier: ^5.64.1
         version: 5.64.1(react@19.1.0)
@@ -274,6 +277,9 @@ importers:
       '@apollo/client':
         specifier: 'catalog:'
         version: 3.12.4(@types/react@19.1.2)(graphql-ws@5.16.0(graphql@16.9.0))(graphql@16.9.0)(react-dom@19.1.0(react@19.1.0))(react@19.1.0)
+      '@repo/utils':
+        specifier: 'workspace:'
+        version: link:../utils
       dayjs:
         specifier: 'catalog:'
         version: 1.11.13
@@ -413,6 +419,31 @@ importers:
         specifier: 'catalog:'
         version: 5.7.2
 
+  packages/utils:
+    dependencies:
+      dayjs:
+        specifier: 'catalog:'
+        version: 1.11.13
+      radashi:
+        specifier: 'catalog:'
+        version: 12.5.1
+      zod:
+        specifier: 'catalog:'
+        version: 3.24.1
+    devDependencies:
+      '@repo/eslint-config':
+        specifier: workspace:*
+        version: link:../eslint-config
+      '@repo/typescript-config':
+        specifier: workspace:*
+        version: link:../typescript-config
+      vite-tsconfig-paths:
+        specifier: 'catalog:'
+        version: 5.1.4(typescript@5.7.2)(vite@5.4.11(@types/node@20.17.8))
+      vitest:
+        specifier: 'catalog:'
+        version: 2.1.8(@types/node@20.17.8)(jsdom@25.0.1)(msw@2.7.0(@types/node@20.17.8)(typescript@5.7.2))
+
 packages:
 
   '@alloc/quick-lru@5.2.0':