Why Does Mother’s Day Change Dates Every Year?

The date of U.S. Mother’s Day moves because the holiday follows a weekday rule—the second Sunday in May—not one fixed day of the month. Depending on the year, it can fall anywhere from May 8 through May 14.

How to calculate it yourself

Find the first Sunday in May on any calendar. Count forward seven days to the second Sunday. That is Mother’s Day in the United States, regardless of what date was used the previous year.

Examples across three years

In 2026, U.S. Mother’s Day was May 10. In 2027 it is May 9. In 2028 it is May 14. The weekday remains Sunday, while the numbered date shifts as the calendar advances.

Why the rule is useful

A Sunday observance helps many families coordinate visits, even though not everyone has Sunday off. Businesses plan floral deliveries, brunches and promotions around the rule rather than a fixed date.

International exceptions

Mother’s Day is not a single worldwide holiday with one shared date. Some countries observe it on a different day or connect it with separate traditions, so use a local calendar when sending a gift abroad.

Frequently asked question

Can Mother’s Day be on May 7 or May 15 in the U.S.?

No. The second Sunday must fall between May 8 and May 14.

Source and further reading

Reference: Calendar reference.