Sanders Sides Wiki

I know that the Sides don't have exact birthdays since they are not human and Thomas's imagination but I want to see if anyone know the fanon birthdays.

Patton: January 15 (confirmed by Thomas) as the date of the "Dad" character first appeared in Thomas's Vines.

Roman: June 4? (Why? Idk. Does anyone else?) (confirmed by Thomas by posting on Instagram stories?)

Logan: ?

Virgil: ?

If anyone knows Logan or Virgil's birthday and maybe even why, please tell. Or if you know if June 4th is Roman's actually fanon birthday and why.

Thank you.