September tenth 

National prank your friends by saying you and you significant other broke up day.

Omg Emily me and Devon broke up.
Just kidding it's September tenth.

September tenth by Bobbbbyyyyy bon bon Bonny September 10, 2021

September tenth 

Tell your crush you like them

Hey jimmy it’s September tenth you have to tell Sarah that you like her -jimmy is it really oh dang your right

September tenth by Daddyjake September 9, 2022

September-Tenth 

(adj) 1. Referring to anything passé.
2. Demonstrating disregard for homeland security.

1. Ally’s mum had her colours done. That shit is so September-Tenth.
2. Feeling the urge to purge? Bulimia is so September-Tenth.
3. Can you believe they didn’t search my bags in Newark? That is so September-Tenth.

September-Tenth by -g. September 27, 2003