Elias the Smol Bean

They were born in different time zones

they be triplets

That's because they have another sibling who was also born on the same day, month, and year. So they are triplets. There's another possible answer that one of the girls was born in the morning and the other was born in the night. Idk if they'd be twins if they were born on the same day tho-

The answer i was thinking of was in vitro fertilization, but the first works too