# Days until Mother’s Day

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

- Page: https://www.acalculator.org/days/days-until-mothers-day
- JSON spec: https://www.acalculator.org/days/days-until-mothers-day.json
- Version: 63cd8d2bdeb0

## 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 222 days until Mother’s Day on Sunday, May 9, 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 Mother’s Day | Whole days from the start date to the next Mother’s Day; 0 on the day itself. |
| date | Date | The next date of Mother’s 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 Mother’s Day on or after the start date, then count the days from the start date to it.

## Assumptions

- US Mother’s Day is the second Sunday of May (36 U.S.C. 117).
- Start dates from January 1, 1914 to December 31, 2400 work, because Mother’s Day was first proclaimed in 1914.
- 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 = 2026-05-10, days = 129. Source: 36 U.S.C. 117; the rule written again in Python 3 (datetime); docs/progress/WP-43.md.
2. from = 2026-05-11 gives date = 2027-05-09, days = 363. Source: 36 U.S.C. 117; the rule written again in Python 3 (datetime); docs/progress/WP-43.md.

## FAQ

### When is Mother’s Day 2027?

Mother’s Day 2027 is on Sunday, May 9, 2027.

### When is Mother’s Day 2028?

Mother’s Day 2028 is on Sunday, May 14, 2028.

### How is the date of Mother’s Day set?

US Mother’s Day is the second Sunday of May (36 U.S.C. 117). Source: 36 U.S.C. 117.

### How are the days until Mother’s 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 Mother’s Day.

## Sources

- 36 U.S.C. 117; the rule written again in Python 3 (datetime); docs/progress/WP-43.md