February the 13th, i.e. the day before Valentines day. On which single people try desperately to find someone to spend Valentines day with.

Considered by some men (and women) to be the best time of the year to pick up someone for a one night stand.
A: "I'm totally going out tonight"

B: "Why man"?

A: "Its Desperation Day mate, even a looser like you could score"!
by Alasdair Weeks January 19, 2009
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The day Know as Desperate day is the day 12/5 it is used to show how desperate you are.
Hey pls stop being a bitch and inv me to the clan its Desperate day.
by Arealbaby December 5, 2021
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