Add calendar translation

frontend/src/utils/bigCalendarTranslations.ts

@@ -0,0 +1,22 @@
+const bigCalendarTranslations = {
+  date: 'Data',
+  time: 'Czas',
+  event: 'Event',
+  allDay: 'Cały dzień',
+  week: 'Tydzień',
+  work_week: 'Dni robocze',
+  day: 'Dzień',
+  month: 'Miesiąc',
+  previous: 'Cofnij',
+  next: 'Dalej',
+  yesterday: 'Wczoraj',
+  tomorrow: 'Jutro',
+  today: 'Dzisiaj',
+  agenda: 'Agenda',
+
+  noEventsInRange: 'Brak wydarzeń w tym czasie.',
+
+  showMore: (total: number) => `+${total} more`,
+}
+
+export default bigCalendarTranslations

frontend/src/views/coordinator/Schedule.tsx

@@ -14,6 +14,7 @@ import EditSchedule from './EditSchedule'
 import Select from 'react-select'
 import { getLeaders } from '../../api/leaders'
 import useLocalStorageState from 'use-local-storage-state'
+import bigCalendarTranslations from '../../utils/bigCalendarTranslations'
 
 const customStyles = {
   content: {
@@ -229,6 +230,7 @@ const Schedule = () => {
         eventPropGetter={eventGetter}
         min={DateTime.fromObject({ hour: 8, minute: 0 }).toJSDate()}
         max={DateTime.fromObject({ hour: 16, minute: 0 }).toJSDate()}
+        messages={bigCalendarTranslations}
       />
 
       <Modal

frontend/src/views/student/StudentSchedule.tsx

@@ -7,6 +7,7 @@ import { useParams } from 'react-router-dom'
 import Modal from 'react-modal'
 import { useForm } from 'react-hook-form'
 import ScheduleAddGroup from './ScheduleAddGroup'
+import bigCalendarTranslations from '../../utils/bigCalendarTranslations'
 
 const customStyles = {
   content: {
@@ -140,6 +141,7 @@ const StudentSchedule = () => {
         eventPropGetter={eventGetter}
         min={DateTime.fromObject({ hour: 8, minute: 0 }).toJSDate()}
         max={DateTime.fromObject({ hour: 16, minute: 0 }).toJSDate()}
+        messages={bigCalendarTranslations}
       />
 
       <Modal