Leap year starting on Monday
A leap year starting on Monday is any year with 366 days (i.e. it includes 29 February) that begins on Monday, 1 January, and ends on Tuesday, 31 December. Its dominical letters hence are GF, such as the years 1912, 1940, 1968, 1996, 2024, 2052, 2080, and 2120 in the Gregorian calendar or, likewise, 2008, 2036, and 2064 in the obsolete Julian calendar. 
Any leap year that starts on Monday, Wednesday or Thursday has two Friday the 13ths. This leap year contains two Friday the 13ths in September and December. Common years starting on Tuesday share this characteristic.
24th century
The 24th century of the Anno Domini (common era) will begin on January 1, 2301 and end on December 31, 2400 of the Gregorian calendar. Unlike most century years, the year 2400 will be a leap year, and the next century leap year in the Gregorian calendar after 2000."", "", and "", as well as "Star Trek Generations", "", "", and "" are set in the 24th century.