How often does a month contain 5 Sundays Mondays and Tuesdays?

A month can contain 5 Sundays, 5 Mondays, and 5 Tuesdays only if it has at least 29 days. This situation occurs in months with 31 days when the month starts on a Sunday, Monday, or Tuesday. Therefore, it can happen once or twice a year, depending on the calendar configuration.