Why december has 31 days and Why november has 30days?

Answer 1

December has 31 days because it was originally the tenth month of the Roman calendar, which derived its name from "decem," meaning ten. When the calendar was reformed to include January and February, December retained its 31 days. In contrast, November, the eleventh month, has 30 days due to the adjustments made in the Roman calendar to fit the lunar year and the desire to create a more uniform distribution of days across the months. This structure has been maintained in the modern Gregorian calendar.