This is evident in the riot that broke out after England switched from the Julian to the Gregorian Calendar in 1752 and lost eleven days. On the surface, various calendars may seem very different ...

The Gregorian calendar, instituted by Pope Gregory XIII, went into effect in 1582. In the 1,417 years from 1583 through 3000, it’s most common for Easter to fall on April 16, with 61 instances.