Question

why does February has 28 or 29 days

Answer 1

The new months each had 28 days. But that didn't sit well with Numa because even numbers were considered bad luck at the time. So, he added a day on to January, giving the year an odd-numbered 355 days. No one knows why February was left with28 and remained an unlucky month.

Answer 2

Answer:

Because of year of 365 days and 6 hours

Explanation:

As one year contains 365 days and 6 hours so after 4 years the 6 hours becomes a day