I see many folks asking “where is the calendar” and I also had this problem where it became unpinned most of the time. This worked for me.
To fix check 2 things:
- Select avatar at the top right side of the forum screen and select preferences (the little gear rop right).
- Select Interface from the list on the left side.
- Uncheck: Automatically unpin topics when I reach the bottom
- Save changes.
5. Open the Calendar and scroll to the bottom. Check that it is Pinned Globally;