If you’ve ever had a burning need

to know how many days, hours, minutes, and seconds old you are, now is your golden opportunity.

Also, you can calculate how long it has been since various historic events (assuming you know the minute they happened). So, for instance, it has been

46 years
563 months
2,450 weeks
17,153 days
411,672
24,700,262
1,482,015,690 seconds

since the assassination of JFK–give or take a few seconds.