Todomomo

Rei- May 27th to mess my friend who doesn't ship Todomomo and make my Todomomo kid's birthday her birthday as well.
August- August 16th
Hino and Haruhi- tbh I forgot, probably March 13th
Eve- BRUH HER NAME IS EVE BECAUSS SHE WAS BORN ON NEW YEARS EVE

Kirimina

Lmao idk

July 4th?

Miruhawks

December 27th I think? I don't remember.

Iidamei

January 6th.

Kamijirou

Lol idk probably
Stormi- September 7th
Riitsu- November 3rd

Dabi x Toga

October 29th

Nejitama

Amai- 4/20 because I like that
Phoenix- I- idk June 7th

Mt.Kamui

April 30th

Ryushot

The only one I know by heart because it's the same date of a family member

Megami- December 17th. (Asked around and everyone said the 17th.)
Daenerys

Daenerys: October 23rd (Emilia Clarke's birthday)