A month typically has either 28, 29, 30, or 31 days. In the modern Gregorian calendar:
- Most months have either 30 or 31 days.
- February is the exception, having 28 days in a common year and 29 days in a leap year.
- The average number of days in a month is about 30.44 days.
Specifically:
- Months with 31 days: January, March, May, July, August, October, and December.
- Months with 30 days: April, June, September, and November.
- February has 28 days, or 29 in leap years.
This arrangement adds up to approximately 365 days a year, with the extra day in leap years to keep the calendar aligned with Earth's orbit around the Sun.
