A month is a unit of time used to divide the year into smaller segments. It is approximately equal to the length of time it takes the Moon for it to orbit the Earth once. Months are commonly used in calendars to organize and track time.
Find essential details on the 12 months of the year, such as their order, the number of days in each, the current month number, and other essential details. This knowledge will equip you to handle month-related calculations with confidence and efficiency.
Today is Tuesday, January 14, 2025.
January is month number 1 out of 12 months of the year.
There are 12 months in a year.
The concept of a 12-month year originated with the ancient Babylonians around 1500 BC, but the Romans popularized it. The Roman king Numa Pompilius introduced a 12-month calendar around 700 BC, and it was later refined by Julius Caesar in 45 BC with the introduction of the Julian calendar. This calendar, with its 12 months, became the standard for many Western cultures and has remained largely unchanged to this day.
The months of the year ordered from 1 to 12, starting with January and ending with December, as mentioned below:
Each year is divided into twelve months, each with 28 to 31 days. The chart below lists the months that make up a year and the number of days in each.
The number of days in each month is as follows:
| Month number | Name of the Month | Days in Month | Abbreviation | Quarter | Season |
|---|---|---|---|---|---|
| 1 | January | 31 days | Jan. | Q1 | Winter |
| 2 | February | 28 days (common year) 29 days (leap year) | Feb. | Q1 | Winter |
| 3 | March | 31 days | Mar. | Q1 | Spring |
| 4 | April | 30 days | Apr. | Q2 | Spring |
| 5 | May | 31 days | May. | Q2 | Spring |
| 6 | June | 30 days | Jun. | Q2 | Summer |
| 7 | July | 31 days | Jul. | Q3 | Summer |
| 8 | August | 31 days | Aug. | Q3 | Summer |
| 9 | September | 30 days | Sep. | Q3 | Autumn |
| 10 | October | 31 days | Oct. | Q4 | Autumn |
| 11 | November | 30 days | Nov. | Q4 | Autumn |
| 12 | December | 31 days | Dec. | Q4 | Winter |
It's important to note that the second month of the year, February, is the only month with either 28 or 29 days, depending on whether it is a leap year. A leap year occurs every four years and has an extra day, February 29th, to keep our calendar in alignment with the Earth's revolutions around the Sun. The other months have a consistent number of days each year.
Related: Find out how many hours are in a month.
There are 12 months in a year, from January to December.
Current month name: January.
The current month number is: 1 out of 12 months.
3 months from today: Monday, April 14, 2025.
6 months from today: Monday, July 14, 2025.
9 months from today: Tuesday, October 14, 2025.
Related: Months from today
A popular mnemonic to remember the number of days in each month is:
"30 days hath September,
April, June, and November.
All the rest have 31,
except February alone,
which has 28 days clear
and 29 in each leap year."
The Knuckle Method is a visual aid for remembering the number of days each month. By looking at your knuckles and the spaces between them, you can determine which months have 31 days. Start with your left fist and consider each knuckle and space a month. A knuckle represents a month with 31 days, while a space represents a month with fewer than 31 days.
What are the months with 31 days?
The months with 31 days are:
Which months have 30 days?
The months with 30 days are:
What are the months with 28 or 29 days?
February has either 28 or 29 days. It has 28 days in regular years and 29 days in leap years.
How many months have 28 days?
Every month has a minimum of 28 days. The second month of the year, February, is the only one that typically has exactly 28 days, but during leap years (occurring every four years), February has 29 days.
How many weeks are in a month?
A month can have any number of weeks in it. A month can last between 4 weeks and four weeks and three days, depending on the month. The average is 4.3 weeks per month. Learn more.
180 days is approximately 6 months.
90 days is approximately 3 months.
Related: Days to months converter.
36 months represents 3 years. Explanation: 36 months/12 months per year = 3 years.
A quarter represents a three-month period. In a calendar year, there are 4 quarters, which are commonly shortened to Q1, Q2, Q3, and Q4.
Each quarter consists of three consecutive months, making it a useful way to divide the year for business and financial purposes.
60 months represents 5 years. Explanation: 60 months/12 months per year = 5 years.
18 weeks represent 5 and 1/2 (half) months.
18 weeks represent 4 and 1/4 (quarter) months.
In 6 months we have 26 weeks. Explanation: One year has 52 weeks. 52/2 = 26 weeks in half a year.
Read more: Weeks to months.
In 6 months we have 183 days. Explanation: 1 month is equal to 30.44 days. 6 ,months x 30.44 days = 182.62 days, rounded to 183 days.
Related: Months to days.
In 5 yeas we have 60 months. Explanation. On year has 12 months. 12 months x 5 years = 60 months.
In 30 yeas we have 360 months. Explanation. On year has 12 months. 12 months x 30 years = 360 months.
Where do the names of each month come from?
The names of the months hold fascinating origins, each with its unique story:
How do you abbreviate each month?
The common abbreviations for each month are:
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Key takeaways: