Which months have five Sundays

Any month that has 31 days and begins on a Friday, Saturday, or Sunday will contain five Sundays. This happens because a month needs at least 29 days to accommodate five occurrences of any single weekday, and the starting day of the week determines which days appear five times. For example, if January starts on a Friday, it will have five Fridays, five Saturdays, and five Sundays, since it spans 31 days.

The specific months that achieve this pattern vary from year to year based on how the calendar aligns. In any given year, you'll typically find several months with five Sundays, especially among the seven months that have 31 days: January, March, May, July, August, October, and December. Some people consider months with five Sundays fortunate for business or leisure planning, as they provide extra weekend days for activities, shopping, or rest. Tracking these patterns can be useful for businesses that depend on weekend traffic or for individuals planning vacation time around extended weekend availability throughout the year.