• Sexagesimal
• Units of Time
• Measuring angles

The fundamental unit for measuring time is the second (s).

The most common measures of time are:

Second (s).

Minute (min) = 60 s.

Hour (h) = 60 min = 3,600 s.

Day = 24 h.

Week = 7 days.

Fortnight = 15 days.

Month = 28 or 29 or 30 or 31 days.

Quarter = 3 months.

Semester = 6 months.

Year = 365 days or 366 days (leap year).

Decade = 10 years.

Century = 100 years.

Millennium = 1,000 years.

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