Navigate to Production Control > Setup > Calendars > Calendars
https://moodylive.operations.dynamics.com/?cmp=DIR&mi=WorkCalendarTable
Select the Standard calendar
Click Working Times
Click Compose working times
Ensure Standard calendar is selected
Amend the from date and to date for the calendar year to be created
Click OK
https://moodylive.operations.dynamics.com/?cmp=DIR&mi=WorkCalendarTable
Select the Standard calendar
Click Working Times
Click Compose working times
Ensure Standard calendar is selected
Amend the from date and to date for the calendar year to be created
Click OK
D365 Working Calendar