Calendar not showing on desktop when I click the date and time

Hello, I suddenly have no desktop calendar showing when I click on the time and date in the taskbar. There used to be a huge rectangluar thing with a calendar there, but now nothing.

Can anyone please help me with this?
I added a screenshot to show what it does when I click on the date and time... no calendar pops up.

I got it fixed. I think I opened the control panel then defaults and then I clicked calendar and set everything back to its default settings.

tried this..did not do anything for me

solved it by:

1. Clearing the Windows Store Cache
2. Reseting the Calendar app
3. restart explorer.exe (through task manager)

thanks to this page