2024 Calendar

Free printable 2024 calendar with all 12 months

2023 2024 2025
January 2024
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February 2024
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March 2024
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April 2024
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May 2024
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June 2024
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July 2024
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August 2024
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September 2024
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October 2024
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November 2024
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December 2024
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2024 Holidays

Jan 1 New Year's Day
Jan 15 Martin Luther King Jr. Day
Feb 14 Valentine's Day
Feb 19 Presidents' Day
Mar 17 St. Patrick's Day
May 27 Memorial Day
Jun 19 Juneteenth
Jul 4 Independence Day
Sep 2 Labor Day
Oct 14 Columbus Day
Oct 31 Halloween
Nov 11 Veterans Day
Nov 28 Thanksgiving
Dec 25 Christmas Day
Dec 31 New Year's Eve

Other Years

2024
2025
2026
2027
2028

Related Tools

Today's Date Days Left in Year Age Calculator Date Difference

Frequently Asked Questions

2024 starts on a Monday, January 1.

Yes, 2024 is a leap year with 366 days. February has 29 days.

Click the "Print Calendar" button at the bottom right of the page, or press Ctrl+P (Windows) or Cmd+P (Mac). The calendar is optimized for printing and will remove navigation elements automatically.
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Sarah Mitchell, CPA

Certified Public Accountant • 12+ yrs payroll & workforce analytics

Specializes in time management, payroll compliance, and workforce optimization. Helped 500+ businesses streamline time-tracking.

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Finance & Operations • MBA, Wharton

Specializes in financial modeling, regulatory compliance, and data accuracy verification across payroll and tax systems.

Updated Mar 3, 2026 50+ calculators Expert reviewed
Editorial Policies About Us

2024 Calendar: History, Systems, and the Science of Timekeeping

The calendar is humanity's oldest organizational tool. Long before clocks, spreadsheets, or project management software, civilizations tracked the passage of time by observing celestial cycles—the Sun's journey across the sky, the Moon's waxing and waning, the stars' seasonal positions. Our 2024 calendar displays all 12 months of the Gregorian calendar with US holidays, printable and free, but the system behind it has a rich and fascinating history spanning thousands of years.

2024 Quick Facts

  • First day: Monday, January 1, 2024
  • Last day: Tuesday, December 31, 2024
  • Total days: 366
  • Leap year: Yes

A Brief History of the Gregorian Calendar

The calendar you see on this page—the Gregorian calendar—was introduced by Pope Gregory XIII in October 1582. It replaced the Julian calendar, which had been in use since Julius Caesar introduced it in 46 BC. The Julian calendar assumed a year length of exactly 365.25 days and added a leap day every 4 years. The problem? The actual solar year is approximately 365.2422 days—about 11 minutes shorter than the Julian estimate.

The Missing Days: By 1582, the Julian calendar had drifted 10 days from the solar year. Pope Gregory's reform deleted 10 days from October 1582—Thursday October 4 was followed by Friday October 15. Catholic countries adopted the change immediately; Protestant and Orthodox nations followed over the next 300+ years. Britain and its colonies didn't switch until 1752.

Leap Year Rules

The Gregorian calendar's key innovation was a more precise leap year rule that reduces drift to just 1 day every 3,236 years:

Gregorian Leap Year Rule: A year is a leap year if: (1) divisible by 4, AND (2) NOT divisible by 100, UNLESS (3) also divisible by 400. So 2024 is a leap year (÷4), 1900 was NOT a leap year (÷100 but not ÷400), and 2000 WAS a leap year (÷400).

Calendar Systems Worldwide

The Gregorian calendar is the international civil standard, but many cultures use additional calendar systems for religious, agricultural, or traditional purposes:

Calendar Type Year Length Current Use
GregorianSolar365/366 daysInternational civil standard
JulianSolar365.25 daysSome Orthodox churches
Islamic (Hijri)Lunar354/355 daysMuslim religious observances
HebrewLunisolar353–385 daysJewish religious observances
ChineseLunisolar353–385 daysChinese New Year, festivals
Hindu (Vikram Samvat)Lunisolar354–385 daysHindu festivals in India/Nepal
Persian (Solar Hijri)Solar365/366 daysOfficial calendar of Iran/Afghanistan
EthiopianSolar365/366 daysOfficial calendar of Ethiopia
Lunar vs. Solar: Solar calendars (like the Gregorian) track the Earth's orbit around the Sun, keeping seasons aligned. Lunar calendars (like the Islamic) track Moon phases, so months shift through the seasons over a ~33-year cycle. Lunisolar calendars (like the Hebrew and Chinese) use lunar months with occasional "leap months" to stay roughly aligned with the solar year.

Months and Days Reference

Month Days Name Origin
January31Janus, Roman god of beginnings and doorways
February28/29Februa, Roman purification festival
March31Mars, Roman god of war (originally the first month)
April30Possibly from Latin "aperire" (to open), as flowers open
May31Maia, Roman goddess of growth
June30Juno, Roman goddess of marriage
July31Julius Caesar (renamed from Quintilis, "fifth month")
August31Augustus Caesar (renamed from Sextilis, "sixth month")
September30Latin "septem" (seven)—was 7th month in early Roman calendar
October31Latin "octo" (eight)
November30Latin "novem" (nine)
December31Latin "decem" (ten)

Calendar Reform Proposals

The Gregorian calendar, while functional, has quirks that have inspired reform proposals over the centuries:

  • The World Calendar: Proposed in the 1930s, this system would have 4 identical quarters of 91 days (3 months of 31, 30, 30 days). A "World Day" at year-end (and a "Leap Day" in June of leap years) would fall outside any week, keeping dates on the same weekday every year.
  • The International Fixed Calendar: Championed by Kodak founder George Eastman, this system divides the year into 13 months of exactly 28 days (364 days total), plus a "Year Day." Every month starts on Sunday and ends on Saturday. Kodak actually used this internally from 1928 to 1989.
  • The Hanke-Henry Permanent Calendar: Proposed by Johns Hopkins economists, this system modifies the Gregorian calendar so that every date falls on the same day of the week every year. An extra "mini-month" of 7 days would be added every 5–6 years to keep the calendar aligned with the solar year.
Why Reform Hasn't Happened: Calendar reform faces enormous cultural, religious, and logistical resistance. Religious observances (the Sabbath cycle, Easter calculations, Ramadan) depend on the current system. International coordination would be monumental. And simply getting billions of people to change a system they use every day is arguably harder than metrication—which much of the world has already struggled with.

Our free 2024 calendar is printable, shows all US holidays, and includes year navigation. For related tools, try Today's Date, Days Left in Year, Age Calculator, and Date Difference Calculator.