Days until January 21
January 21 falls on a Wednesday in 2026 and a Thursday in 2027. The count runs from today’s date on your device to the next January 21; pick another date to count from it instead.
- Days until January 21
- 113
From September 30, 2026, there are 113 days until January 21 on Thursday, January 21, 2027.
- Date
- Thursday, January 21, 2027
- Day of the week
- Thursday
- In weeks
- 16 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 January 21: 113. From September 30, 2026, there are 113 days until January 21 on Thursday, January 21, 2027.
Where is January 21 on the calendar?
How to calculate
Counts the days from today, or any date you choose, to the next January 21, 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 113 days until January 21 on Thursday, January 21, 2027.
Method: Find the first January 21 on or after the start date, then count the days from the start date to it.
- January 21 comes every year, so the count is never more than 365 days.
- The start date itself is not counted: from the day before January 21, the count is 1; on January 21 itself, it is 0.
- Start dates from January 1, 1900 to December 31, 2400 work for the count to January 21, the range the date field accepts.
- Today is the date on your own device, so the count to January 21 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 2027-01-21 gives Date 2027-01-21, Days until January 21 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 2027-01-21, Days until January 21 20.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
- Count from 2027-01-22 gives Date 2028-01-21, Days until January 21 364.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 January 21?
Wednesday, January 21, 2026; Thursday, January 21, 2027; Friday, January 21, 2028. The weekday of January 21 moves on one day a year, or two when a February 29 falls between.
What day of the year is January 21?
January 21 is day 21 of the year, with 344 days after it (345 in a leap year).
What season is January 21 in?
In the Northern Hemisphere, January 21 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 January 21 a US federal holiday?
In some years. Martin Luther King Jr. Day, a US federal holiday that moves with the weekday, falls on January 21 in 2030, 2036, and 2041.
How are the days until January 21 counted?
From the start date to January 21, without counting the start date: from January 20 the count is 1, and on January 21 it is 0. The day after, it moves on to the next January 21: from January 22, 2026, that is January 21, 2027, 364 days away.