# Days until April Fools’ Day

Counts the days from today, or any date you choose, to the next April Fools’ Day, with its date and day of the week.

- Page: https://www.acalculator.org/days/days-until-april-fools-day
- JSON spec: https://www.acalculator.org/days/days-until-april-fools-day.json
- Version: 097d589e1531

## Default answer

Example with the default inputs (Count from September 29, 2026) on the example date Tuesday, September 29, 2026: From September 29, 2026, there are 184 days until April Fools’ Day on Thursday, April 1, 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 April Fools’ Day | Whole days from the start date to the next April Fools’ Day; 0 on the day itself. |
| date | Date | The next date of April Fools’ Day 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 date of April Fools’ Day on or after the start date, then count the days from the start date to it.

## Assumptions

- April Fools’ Day is April 1 every year.
- Start dates from January 1, 1900 to December 31, 2400 work, because the date field accepts that range.
- The start date itself is not counted: from the day before, the count is 1; on the day itself, it is 0.
- Dates are calendar days with no time of day, so a time zone or a daylight-saving change never adds or loses a day.

## Worked examples

1. from = 2026-01-01 gives date = 2026-04-01, days = 90. Source: the rule written again in Python 3 (datetime); docs/progress/WP-43.md.
2. from = 2026-04-02 gives date = 2027-04-01, days = 364. Source: the rule written again in Python 3 (datetime); docs/progress/WP-43.md.

## FAQ

### When is April Fools’ Day 2027?

April Fools’ Day 2027 is on Thursday, April 1, 2027.

### When is April Fools’ Day 2028?

April Fools’ Day 2028 is on Saturday, April 1, 2028.

### How is the date of April Fools’ Day set?

April Fools’ Day is April 1 every year. Source: the rule written again in Python 3 (datetime).

### How are the days until April Fools’ Day counted?

From the start date (today, unless you change it) to the date, without counting the start date. The day before, the count is 1; on the day itself, it is 0; the day after, the count moves on to the next April Fools’ Day.

## Sources

- the rule written again in Python 3 (datetime); docs/progress/WP-43.md