Question

Two boys are born to to the same mother, on the same day, same time, same year and yet they're not twins?

Answer 1

that means something fishy is going on.

Answer 2

They're triplets :)

They're not twins, they're born to the same mother on the same day, same time and same year. The third child is a girl by high chance because the gender of the third wasn't stated, but that was meant to trick you.