Why February has just 28 days

All months of the year have 30 or 31 days, except for February. When the Roman General Julius Caesar made the Julian calendar, he added 10 days to a year. Each month got an extra day until it became 30 or 31. February was left behind as it was the last month to be added to the calender. Just because each year had 365.25 days, a special day was added to February once every four years. This was called a ‘leap year.’ In these years, February gets 29 days.