It's all canon from the XV Years.

Sorry guys but I'll not including any other Bomberman characters' birthdays.

White Bomber's Birthday - April 6

Black Bomber/Kurorozu's Birthday - September 6

Red Bomber's Birthday - On Valentine's day/Feburary 14(Even Crimson Ruby Bomber has same birthday as her big sibling but she really doesn't care about birthdays)

Blue Bomber's Birthday - July 21

Green Bomber's Birthday - April 26

Yellow Bomber's Birthday - August 8

Pink Bomber's Birthday - March 3

Light Blue/Aqua Bomber's Birthday - August 1

Orange Bomber's Birthday - October 30

Purple Bomber's Birthday - October 10

Brown Bomber's Birthday - April 1(Probably Brown will fool you)

Grey Bomber's Birthday - September 15