Time

1 hour (hr) = 60 minutes
1 minute (min) = 60 seconds (sec)
1 day = 24 hours
1 week (wk) = 7 days
1 month (mo) = 28 to 31 days ***
1 year (yr) = 12 months
= 52 weeks
= 365 days
1 leap year = 366 days
1 decade = 10 years
1 century (c) = 100 years
1 millennium = 1,000 years

***

Month       Number of Days
January 31
February 28 (leap year: 29)
March 31
April 30
May 31
June 30
July 31
August 31
September 30
October 31
November 30
December 31

 

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