When did the following event happen?
Pope Gregory XIII issues the Gregorian Calendar, reducing the number of leap years to make the average year 365.2425 days long.
Select a space in the timeline below.
1963
US president John F. Kennedy is assassinated.
Note:
BCE means that the date is the number of years before the current era (CE/AD).
c. is short for 'circa' and indicates that the date is considered approximate.