What is the Days Until Mother's Day Calculator?
In the United States and many other countries, Mother's Day falls on the second Sunday of May every year. Because the date shifts each year, it can be hard to know exactly how many days are left. This calculator finds the precise date for any year and counts the days from today (or any start date you choose) to that Sunday.
How to use it
Enter the year you want to check. Optionally pick a "count from" date — if you leave it blank, the calculator counts from today. The result shows the number of days remaining and the exact Mother's Day date for that year.
The formula explained
$$\text{Days} = \text{MothersDay} - \text{From Date}$$
$$\text{where}\quad \left\{ \begin{aligned} \text{MothersDay} &= \text{2nd Sunday of May, }\text{Year} \\ \text{From Date} &= \text{supplied date, else today} \end{aligned} \right.$$
First we determine the day of week of May 1. The first Sunday is found by adding the offset needed to reach Sunday; if May 1 is already Sunday the offset is 0. We then add 7 days to land on the second Sunday. Finally, we subtract the start date from that Mother's Day date and divide the millisecond difference by \(86{,}400{,}000\) (the number of milliseconds in a day) to get whole days.
Worked example
For 2024, May 1 is a Wednesday. The first Sunday is May 5, so the second Sunday — Mother's Day — is May 12, 2024. Counting from May 1, 2024 gives 11 days.
$$\text{Days} = \text{May 12, 2024} - \text{May 1, 2024} = 11$$
FAQ
Is Mother's Day always the same date? No. It is always the second Sunday of May, but the calendar date changes each year (between May 8 and May 14).
What if the date has already passed? If your start date is after Mother's Day for that year, the result will be negative, indicating how many days ago it occurred.
Does this apply to every country? The "2nd Sunday of May" rule applies to the US, Canada, Australia and many others, but some countries celebrate on different dates. This tool uses the second-Sunday-of-May rule.
