A week is a unit of time that has 7 days. There are approximately 52 weeks in a year.

## Days in a Year

The definition of a year is the amount of time it takes our planet, Earth, to make one revolution around the Sun.

A day is the time it takes the Earth to make one rotation on its axis.

Earth rotates on its axis about 365.2422 times a year.

In the Gregorian calendar (introduced in October 1582), the days in a year were shortened to 365 days. Then, every leap year it plays “catch up” by having an extra day in February.

## Exact Weeks in a Year

Because there are 365 days in a normal year, there are actually 52.1 weeks in a year, or 52 weeks + a day.

**365 Days (per year) ÷ 7 Days (per week) = 52.1428571429 Weeks in a year**

A leap year has 366 days, which is equal to 52.3 weeks, or 52 weeks + 2 days.

## Weeks in Every Year

Every year has 52 weeks + 1 day, except leap years that have 52 weeks + 2 days.

Year | Leapyear? | Days in year | Weeks in year |
---|---|---|---|

2019 | No | 365 | 52 weeks + 1 day |

2020 | Yes | 366 | 52 weeks + 2 days |

2021 | No | 365 | 52 weeks + 1 day |

2022 | No | 365 | 52 weeks + 1 day |

2023 | No | 365 | 52 weeks + 1 day |

2024 | Yes | 366 | 52 weeks + 2 days |

2025 | No | 365 | 52 weeks + 1 day |

2026 | No | 365 | 52 weeks + 1 day |

2027 | No | 365 | 52 weeks + 1 day |

2028 | Yes | 366 | 52 weeks + 2 days |

## Weeks in a Month

Every month with 31 days has 4.4 weeks (4 weeks + 3 days).

Months with 30 days have 4.3 weeks (4 weeks + 2 days).

February is the shortest month with 28 days that equals exactly 44 weeks. However, in a leap year, it has 29 days and 4.1 weeks (4 weeks + 1 day).

Month | Days in month | Weeks in month |
---|---|---|

January | 31 | 4.4 weeks (4 weeks + 3 days) |

February | 28; 29 in leap year | 4 weeks; 4.1 weeks (4 weeks + 1 day) |

March | 31 | 4.4 weeks (4 weeks + 3 days) |

April | 30 | 4.3 weeks (4 weeks + 2 days) |

May | 31 | 4.4 weeks (4 weeks + 3 days) |

June | 30 | 4.3 weeks (4 weeks + 2 days) |

July | 31 | 4.4 weeks (4 weeks + 3 days) |

August | 31 | 4.4 weeks (4 weeks + 3 days) |

September | 30 | 4.3 weeks (4 weeks + 2 days) |

October | 31 | 4.4 weeks (4 weeks + 3 days) |

November | 30 | 4.3 weeks (4 weeks + 2 days) |

December | 31 | 4.4 weeks (4 weeks + 3 days) |