Units of Time
We measure time mainly with seconds, minutes, hours, days, weeks, months and years:
| 1000 milliseconds | = | 1 second |
| 60 seconds | = | 1 minute |
| 60 minutes | = | 1 hour |
| 24 hours | = | 1 day |
| 7 days | = | 1 week |
| 28, 29, 30 or 31 days | = | 1 month |
| 365 or 366 days | = | 1 year |
| 12 months | = | 1 year |
| 10 years | = | 1 decade |
| 100 years | = | 1 century |
| 1000 years | = | 1 millennium |