look up any word, like b4nny:
 
1.
The name of the day your username was born (on Reddit.com).

A great day of celebration, which typically requires a post.

Usernames celebrating their cake day will have a cake icon next to their username.
Today is my cake day, and my actual birthday is a week from now and Thanksgiving is Thursday, thus making this an awesome week. Reddit, I want to know, what was your best week ever? on Nov 22 from lawngnomeking
by Kaidra November 26, 2011
 
2.
The day marking the anniversary of Marie Antoinette's death by guillotine on October 16, 1793. It is celebrated by the making and consumption of large, elaborate, and ostentatious cakes that are shared with all, especially peasants.
Hey everyone, it's Oct. 16th, come have some of this fabulous cake that I made to celebrate Cake Day!
by T. Flame October 16, 2013
 
3.
The anniversary of a person's birth, traditionally celebrated with a party which includes cake, hence the name.
Me: Whoa Alex you're 24 today! Happy cakeday!
Alex: Thanks!
by doctor horny July 29, 2013
 
4.
A euphoric day in which pleasure comes from circumstances in which one is driven by desire, as one might be driven to eat the irresistible sugar in a cake.
A first kiss would make a normal day into a cake day.
by jessvancar November 20, 2009
 
5.
An alternative way to say "birthday". Popular on Reddit.
Hooray! Happy Cake Day to me!
by icedoverfire June 21, 2012
 
6.
When you and all your mates rock over to someone’s house and make a big fuck off cake with half an ounce of weed in it.
chime for cake day at ali's
by Alex June 25, 2004