Months of the Year
Complete guide to all 12 months with days, seasons, birthstones, and more
Quick Reference
All 12 Months
January
Month #1
February
Month #2
March
Month #3
April
Month #4
May
Month #5
June
Month #6
July
Month #7
August
Month #8
September
Month #9
October
Month #10
November
Month #11
December
Month #12
Months by Quarter
Q1
- January
- February
- March
Winter/Spring
Q2
- April
- May
- June
Spring/Summer
Q3
- July
- August
- September
Summer/Fall
Q4
- October
- November
- December
Fall/Winter
How Many Days in Each Month?
| Month | Days | Season | Birthstone |
|---|---|---|---|
| ❄️ January | 31 | Winter | Garnet |
| 💝 February | 28 (29 in leap years) | Winter | Amethyst |
| 🌸 March | 31 | Spring | Aquamarine |
| 🌷 April | 30 | Spring | Diamond |
| 🌼 May | 31 | Spring | Emerald |
| ☀️ June | 30 | Summer | Pearl or Alexandrite |
| 🎆 July | 31 | Summer | Ruby |
| 🌻 August | 31 | Summer | Peridot |
| 🍂 September | 30 | Fall | Sapphire |
| 🎃 October | 31 | Fall | Opal or Tourmaline |
| 🦃 November | 30 | Fall | Topaz or Citrine |
| 🎄 December | 31 | Winter | Turquoise or Tanzanite |
Leap Years
2025 is NOT a Leap Year
Leap years occur every 4 years to keep our calendar aligned with Earth's orbit around the Sun. In leap years, February has 29 days instead of 28, making the year 366 days long instead of 365.
Leap Year Rule: A year is a leap year if it's divisible by 4, except for years divisible by 100 (which are not leap years), unless they're also divisible by 400 (which makes them leap years again).
Examples: 2024 is a leap year (divisible by 4), 1900 was not a leap year (divisible by 100 but not 400), 2000 was a leap year (divisible by 400).
🔢 Leap Year Calculator
Enter any year to check if it's a leap year:
Interesting Facts
🗓️ Month Origins
The names of months come from Roman gods, emperors, and numbers:
- March-June: Named after Roman gods (Mars, Maia, Juno)
- July-August: Named after Julius and Augustus Caesar
- September-December: From Latin numbers (7th-10th in old calendar)
📏 Days per Month
Remember the knuckle trick to count days:
- Knuckles = 31 days (Jan, Mar, May, Jul, Aug, Oct, Dec)
- Valleys between knuckles = 30 days (Apr, Jun, Sep, Nov)
- February is the exception with 28/29 days
🌍 Calendar History
The modern Gregorian calendar was introduced by Pope Gregory XIII in 1582, replacing the Julian calendar. It's the most widely used calendar system in the world today. The old Roman calendar only had 10 months, which is why September-December have names meaning "seventh" through "tenth" even though they're the 9th-12th months.
🎂 Birth Months
Each month has an associated birthstone, flower, and zodiac sign. These traditions date back thousands of years and have been celebrated by various cultures. September is statistically the most common birth month in the United States, while February is the least common.