According to staffers at the San Diego Kaiser Permanente Zion Medical Center, the twins – baby girl, Jaelyn, and baby boy, Luis – were born at 11:59 p.m. on Dec. 31 and at 12:02 a.m. on Jan. 1, respectively, to mother Maribel Valencia, 22, and her husband, Luis.

Though the twins will be sharing a lot of things over the years, they will certainly not be sharing a birthday…

“[Maribel] really wanted to have the babies on the same birthday because you know later on in the years, they’re going to have a little confrontation and be like, ‘my birthday came first,’ so it means two birthday parties, back to back,” said Luis.