How many Sundays in 100 years from 1912 to 2012?

In a 100-year period, there are typically 52 weeks per year, resulting in 5,200 Sundays. However, considering leap years, which add an extra Sunday every four years, there are 25 leap years from 1912 to 2012. This brings the total to 5,200 + 25 = 5,225 Sundays in that time frame.