"Eid is on Tuesday. What d'you mean, we're having our on Wednesday. How come? Hey that's when our mosque is doing it so don't ask me!"
How many of us have had this kind of chat year in year out? Why do we have Eid on two separate days? Why can't the ulema agree to have it on one day? What are the arguments and debates behind the scene? Who's to blame?
The following saying of the Prophet (SAW) should make this clear: "Fast after sighting the moon and end the moon after sighting it. If it is cloudy then complete thirty days of shaban." (Bukhari)