Actually, Annoy Squidward Day is January 15th. Although the calendar doesn’t have the month written on it, if you continue to watch the episode, they’re competing for January’s Employee of the Month.
I can’t speak for other social media webbed sites but I really enjoy how tumblr seems to just completely spin a wheel on whatever media is hot right now. Like yeah sometimes it’s a new show that’s big and actively coming out but also sometimes there will be a solid month where half my dash is Columbo memes. Defy authority. Get really into an book from the 1800s. Watch shows that haven’t aired in 40 years. Celebrate the anniversary of the Boston Molasses Flood. Become unmarketable