# Days until January 27

Counts the days from today, or any date you choose, to the next January 27, with its day of the week.

- Page: https://www.acalculator.org/days/days-until-january-27
- JSON spec: https://www.acalculator.org/days/days-until-january-27.json
- Version: 43c92db9727a

## Default answer

Example with the default inputs (Count from September 30, 2026) on the example date Wednesday, September 30, 2026: From September 30, 2026, there are 119 days until January 27 on Wednesday, January 27, 2027.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| from | Count from | The date to count from. Today, unless you change it. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| days | Days until January 27 | Whole days from the start date to the next January 27; 0 on the day itself. |
| date | Date | The next January 27 on or after the start date. |
| weekday | Day of the week | The weekday of that date. |
| weeks | In weeks | The same number of days in weeks and days. |

## Method

Find the first January 27 on or after the start date, then count the days from the start date to it.

## Assumptions

- January 27 comes every year, so the count is never more than 365 days.
- The start date itself is not counted: from the day before January 27, the count is 1; on January 27 itself, it is 0.
- Start dates from January 1, 1900 to December 31, 2400 work for the count to January 27, the range the date field accepts.
- Today is the date on your own device, so the count to January 27 changes at midnight where you are. Dates are whole calendar days, so a daylight-saving change never adds or loses a day.

## Worked examples

1. from = 2027-01-27 gives date = 2027-01-27, days = 0. Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years).
2. from = 2027-01-01 gives date = 2027-01-27, days = 26. Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years).
3. from = 2027-01-28 gives date = 2028-01-27, days = 364. Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years).

## FAQ

### What day of the week is January 27?

Tuesday, January 27, 2026; Wednesday, January 27, 2027; Thursday, January 27, 2028. The weekday of January 27 moves on one day a year, or two when a February 29 falls between.

### What day of the year is January 27?

January 27 is day 27 of the year, with 338 days after it (339 in a leap year).

### What season is January 27 in?

In the Northern Hemisphere, January 27 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 27 a US federal holiday?

No. No US federal holiday falls on January 27. The next one in the calendar after January 27 is Washington's Birthday (Presidents' Day), which falls between February 15 and February 21.

### How are the days until January 27 counted?

From the start date to January 27, without counting the start date: from January 26 the count is 1, and on January 27 it is 0. The day after, it moves on to the next January 27: from January 28, 2026, that is January 27, 2027, 364 days away.

## Sources

- 5 U.S.C. 6103 (federal holidays; weekend rule in 6103(b) and Executive Order 11582). Checked against OPM holiday schedules.
- Equinoxes and solstices: Jean Meeus, Astronomical Algorithms (2nd ed., 1998), chapter 27, checked against the US Naval Observatory.