Years
Decade
10 years
A week
7 days
A year
12 months
A day
24
1 minute
60 seconds
Century
100 years
A year
365 days
Half a year
6 months
Half a day
12 hours
half a minute
30 seconds
Millennium
1000 years
24 hours
1 day
A quarter of a year
3 months
A quarter of a day
6 hours
2 minutes
120 seconds
36 months
3 years
January
31 days
A third of a year
4 months
A third of a day
8 hours
1000 milliseconds
1 second
Biennium
2 years
2 years
730 days
4 years
48 months
3 days
72 hours
500,000 microseconds