Together with awesome folks, I am working on making a list with all the special tags for photography.
Not "just" all the tags, but the ones that have a special topic-day.
When you see the list, you (probably) will understand what I mean...

If you know any of these kinds of photography tags that are missing, do let me know, and I will try to add them all to the list!

This is what we have collected so far:

Monday:
#MonDog
#MountainMonday
#MonochromeMonday

Tuesday:
#TongueOutTuesday
#ThickTrunkTuesday (or Thursday)
#MardiPatisserie (tasty treats)

Wednesday:
#WaterfallWednesday
#MeerMittwoch

Thursday:
#ThickTrunkTuesday (or Tuesday)
#Doorsday

Friday:
#FensterFreitag
#FootpathFriday

Saturday:
#Caturday

Sunday:
#SilentSunday
#StandingStoneSunday

Please, if I missed any, do let me know! I hope to make this list as complete as possible.