These one-year calendars divide evenly into of two sets of seven calendars: seven for each common year (year that does not have a February 29) that starts on each day of the week, and seven for each leap year that starts on each day of the week, totaling fourteen.

The ancient Sumerian calendar divided a year into 12 lunar months of 29 or 30 days.

The traditional East Asian calendars divide a year into 24 solar terms (節氣).

The 4-4-5 calendar divides a year into 4 quarters.

The calendar divides time between B.C. and A.D., with anno Domini denoting the years since the birth of Jesus.

Like the Gregorian system, the Kurdish calendar divides the year into four seasons: Buhar, Tawistan or Hawín, Payiz and Zimistan.

Many other systems of measurement divided the day differently; other calendars divided the year differently.