Days until March 18
March 18 falls on a Wednesday in 2026 and a Thursday in 2027. The count runs from today’s date on your device to the next March 18; pick another date to count from it instead.
- Days until March 18
- 169
From September 30, 2026, there are 169 days until March 18 on Thursday, March 18, 2027.
- Date
- Thursday, March 18, 2027
- Day of the week
- Thursday
- In weeks
- 24 weeks and 1 day
Answer for the example date Wednesday, September 30, 2026. It changes to today's date when the page loads.
Days until March 18: 169. From September 30, 2026, there are 169 days until March 18 on Thursday, March 18, 2027.
Where is March 18 on the calendar?
How to calculate
Counts the days from today, or any date you choose, to the next March 18, with its day of the week.
Example with the default inputs (Count from September 30, 2026) on the example date Wednesday, September 30, 2026: From September 30, 2026, there are 169 days until March 18 on Thursday, March 18, 2027.
Method: Find the first March 18 on or after the start date, then count the days from the start date to it.
- March 18 comes every year, so the count is never more than 365 days.
- The start date itself is not counted: from the day before March 18, the count is 1; on March 18 itself, it is 0.
- Start dates from January 1, 1900 to December 31, 2400 work for the count to March 18, the range the date field accepts.
- Today is the date on your own device, so the count to March 18 changes at midnight where you are. Dates are whole calendar days, so a daylight-saving change never adds or loses a day.
Worked examples
Each example is checked against the calculator on every build.
- Count from 2027-03-18 gives Date 2027-03-18, Days until March 18 0.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
- Count from 2027-01-01 gives Date 2027-03-18, Days until March 18 76.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
- Count from 2027-03-19 gives Date 2028-03-18, Days until March 18 365.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
Other questions people ask
What day of the week is March 18?
Wednesday, March 18, 2026; Thursday, March 18, 2027; Saturday, March 18, 2028. The weekday of March 18 moves on one day a year, or two when a February 29 falls between.
What day of the year is March 18?
March 18 is day 77 of a common year and day 78 of a leap year, such as 2028. Either way, 288 days of the year come after it.
What season is March 18 in?
In the Northern Hemisphere, March 18 is in winter in every year from 2026 to 2035; in the Southern Hemisphere, it is summer. Seasons here start on the astronomical equinoxes and solstices, dated in US Eastern Time.
Is March 18 a US federal holiday?
No. No US federal holiday falls on March 18. The next one in the calendar after March 18 is Memorial Day, which falls between May 25 and May 31.
How are the days until March 18 counted?
From the start date to March 18, without counting the start date: from March 17 the count is 1, and on March 18 it is 0. The day after, it moves on to the next March 18: from March 19, 2026, that is March 18, 2027, 364 days away.