A boy celebrated his birthday with some friends. Strangely, 2 days later, his elder twin celebrated his birthday with the same friends. Now those friends got confused and asked why the order was different, and the twins showed the correct times of their births on their birth certificates. So, the friends were satisfied.
Explain the situation.
I made this puzzle by combining two different puzzles. So, if you have solved many such puzzles, then try to combine those answers.
Even though I made this puzzle independently, I now see that somebody else has already made it around 12 years ago.