Months are the dates that are in our lives and are very important. There are exactly 12 months in a year.

Table of Contents

**How Many Days in a Month?**

From the months of the year, April, June, September and November last 30 days. January, March, May, July, August, October and December last 31 days and February has 28 days. February lasts 28 days in common years and 29 days in leap years.

## Months Number

The table below contains **the days of the month**, **the total number of days**, **the short names of the months**, and **the seasons of the year**.

month | short month name | days | season | |
---|---|---|---|---|

1 | January | Jan. | 31 | winter |

2 | February | Feb. | 28/29 | |

3 | March | Mar. | 31 | spring |

4 | April | Apr. | 30 | |

5 | May | May | 31 | |

6 | June | Jun. | 30 | summer |

7 | July | Jul. | 31 | |

8 | August | Aug. | 31 | |

9 | September | Sep. | 30 | autumn |

10 | October | Oct. | 31 | |

11 | November | Nov. | 30 | |

12 | December | Dec. | 31 | winter |

**Why are there 12 months in the year?**

To keep a year in sync with the seasons, Julius Caesar’s astronomers made the year 12 months and added a leap year. At that time the calendar (Gregorian or Gregorian calendar) had only 10 months, but a year had 12 lunar cycles.

The months of January and February have been added to the calendar. The ancient calendar, like many other world calendars, began in March, which coincided with the arrival of the Spring season. Likewise, the reason why the names of September, October, November and December are September (seventh month), October (eighth month), November (ninth month) and December (tenth month), respectively, is that these months fall into this order when the year starts in March.

In the old calendar, months were either 30 or 31 days. These numbers are thought to be random. However, without adding January and February, the remaining 57 days were not included in any month.

**Why Don’t All Months Have the Same Number of Days?**

The Gregorian calendar, or the Gregorian calendar used today, was adopted on October 4, 1582. According to this, The birth of Jesus was accepted as the 1st year, which means that it was determined as 1 year, 365 days and 6 hours. This is the most realistic calendar system since there is only 10.8 seconds of error per year.

The ancient Romans discovered that there are 365 days and 6 hours in a year with the help of the lunar cycle. However, they first determined a 10-month year system for themselves. In short, it stayed in the air for 60 days.

In 700 BC, Decemvirs were added before January, and Februarius of 29 days after January, in order to save 60 days somehow. The last regulation, which was created by Julius Caesar in 46 BC, brought the system that performed the month of February for 29 days every 4 years, and the other months for 30 and 31 days. The month of Sextilis was soon changed to Augustus to honor Augustus Caesar.

**How Many Days in a Year?**

The Earth completes one full revolution around the Sun in 365 days and 6 hours. Therefore, 1 year is calculated as 365 days. It is added to February every 4 years in 6 hours. For this reason, February, which has 28 days, takes 29 days every 4 years.However, the original Roman calendar, which sheds light on our day, has only 10 months and a year consists of 304 days.

Also, have you read “How many weeks in a year?“.

**Which years are leap years?**

In 2016, February was 29 days.

In 2017, February was 28 days.

In 2018, February was 28 days.

In 2019, February was 28 days.

In 2020, February was 29 days.

In 2021, February had 28 days.

In 2022, February will be 28 days.

In 2023, February will be 28 days.

In 2024, February will have 29 days.

In 2025, February will have 28 days.

In 2026, February will have 28 days.

In 2027, February will be 28 days.

In 2028, February will have 29 days.

**The 12 Months**

1-January – 31 days

2-February – 28 days in a common year and 29 days in leap years

3-March – 31 days

4-April – 30 days

5-May – 31 days

6-June – 30 days

7-July – 31 days

8-August – 31 days

9-September – 30 days

10-October – 31 days

11-November – 30 days

12-December – 31 days

**Old Names of Months**

The names of these months, called Martius, Aprilis, Maius, Junius, Quintilis, Sextilis, September, October, November and December, came from Latin numbers.