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Unbirthday

Any day that isn't technically your date of birth.
Refers to Louis Carroll's Alice in Wonderland, where there Mad Hatter and his crew celebrate such a day.
Can also be utilized for no damn reason except to celebrate..
Today is my Unbirthday, three and one.
by REBel Siren January 2, 2023
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Unibirth

Being born on the same day as the number of your birth month.

For example:

12/12/91 or 5/5/91
Hey I have a unibirth ! I was born on 12/12/1991. How about you?

I am a unibirth too! I was born on 5/5/91
by Uno125 December 19, 2017
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