twins just have to develop in the same womb at the same period of time. When they are born has nothing to do with it.
People born on the same day are commonly referred to as "birthday twins" or simply as "born on the same day."
freternal twins are born on the same day but don't look alike.
TwiNs
They are puppies, not humans. Puppies born to the same litter are considered litter mates, but not twins.
Two siblings born in the same month and on the same day, but in a different year are simply called 'siblings.' If they both were born on the same month; day and year they would be twins.
only if they come from the same pregnancy.
Gravel twins
They werent born in the same year. They are sisters
they're both twins then
isabel and john finn
Sister from another MR ..Or Brother from another Mother;DD ( distant twins ) or earth twins.
triplets