How many days are between Martin Luther King Jr. Day and Mother's Day?

Q: How many days are between Martin Luther King Jr. Day and Mother's Day?

111 days. Martin Luther King Jr. Day falls on Monday, January 18, 2027 and Mother's Day on Sunday, May 9, 2027, which is 111 days later — 15 weeks and 6 days, or 79 business days counting Monday to Friday only. The first day is not counted and the last one is, the same way a calendar counts a stay. Both dates are fixed, so the gap is the same every year apart from leap-year shifts in the weekdays.

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Result

111 days

Days: 111
Weeks and days: 15 weeks, 6 days
Months and days: 3 months, 21 days
Business days (Mon–Fri): 79
Weekend days: 32
Resulting date: —
Day of the week: Monday → Sunday

Assumptions

Dates are local calendar dates; times and time zones are ignored.
Business days are Monday–Friday with no holiday exclusions.
Adding months keeps the day of month, clamped to the target month's length.

Common deadlines from January 18, 2027

After	Date	Falls on a
7 days	January 25, 2027	Monday
14 days	February 1, 2027	Monday
21 days	February 8, 2027	Monday
30 days	February 17, 2027	Wednesday
45 days	March 4, 2027	Thursday
60 days	March 19, 2027	Friday
90 days	April 18, 2027	Sunday
120 days	May 18, 2027	Tuesday
180 days	July 17, 2027	Saturday
365 days	January 18, 2028	Tuesday

Calendar days counted from the start date, the day itself not counted. Deadlines written as 'within 90 days' are calendar days unless the contract or court rule says business days.

From Martin Luther King Jr. Day to Mother's Day in 2027

111 days

Counted from Thursday, September 17, 2026. The dates shown are the next ones to come round.

Days apart: 111
Business days: 79
Weekend days: 32
That is: 15 weeks and 6 days

Martin Luther King Jr. Day falls on Monday, January 18, 2027 and Mother's Day on Sunday, May 9, 2027, which is 111 days later — 15 weeks and 6 days, or 79 business days counting Monday to Friday only. The first day is not counted and the last one is, the same way a calendar counts a stay. Both dates are fixed, so the gap is the same every year apart from leap-year shifts in the weekdays.

The next five years

Year	Dates	Days apart
2027	January 18, 2027 → May 9, 2027	111 days
2028	January 17, 2028 → May 14, 2028	118 days
2029	January 15, 2029 → May 13, 2029	118 days
2030	January 21, 2030 → May 12, 2030	111 days
2031	January 20, 2031 → May 11, 2031	111 days

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<p style="font:14px/1.5 system-ui,sans-serif;margin:8px 0 0"><a href="https://www.calculateitnow.dev/days-between-mlk-day-and-mothers-day">Martin Luther King Jr. Day to Mother's Day</a> by CalculateItNow</p>
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