# Time Units and Calendar Facts

Know the number of seconds in a minute and the number of days in each month, year, and leap year

Builds on: Number of minutes in an hour (hard, https://ai.page/c/number-of-minutes-in-an-hour/en.md)

Concept id: time-units-and-calendar-facts. Subject: maths. Licence: CC BY-SA 4.0.

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