How many minutes in sixty years?

Answer 1

It's either 31,556,160 minutes or 31,557,600 minutes depending on what 60-year period you are measuring. For example, the period from 1 January 2001 @ 00:00:00 through 1 January 2061 @ 00:00:00 is 31,557,600 minutes, and the period from 1 January 2061 @ 00:00:00 through 1 January 2121 @ 00:00:00 is 31,556,160 minutes.

The second period specified is one day shorter than the first period because the first period has 15 leap year days (every four years from 2004 through 2060), and the second period has 14 leap year days (every four years from 2064 through 2096 and every four years from 2104 through 2120).

This answer assumes that the time zone and the Daylight Saving Time or Summer Time status are the same at the beginning and end of the period.