How Many Days Until Martin Luther King Jr. Day 2029?

Martin Luther King Jr. Day 2029 is Monday, 15 January 2029

There are 871 days between 28 August 2026 and Martin Luther King Jr. Day 2029, which falls on Monday, 15 January 2029. That is 124 weeks and 3 days, or 592 working days once Saturdays, Sundays and the US federal holidays in between are taken out — the figure that matters if you are counting delivery lead time or a work schedule rather than sleeps. The date is 2029-01-15 in ISO form and 1/15/2029 in the US format, it falls in ISO week 3 of 2029, and it is day 15 of 365.

How the date of Martin Luther King Jr. Day is decided

The third Monday in January, so it falls between 15 and 21 January. It has been a federal holiday since 1986.

That makes it a floating date: it is pinned to a weekday rather than to a day number, so it is always a Monday but the date moves. In 2029 that is 15 January.

Martin Luther King Jr. Day is one of the eleven US federal holidays. Federal offices, banks and the bond market close, and it does not count as a business day in any of the business-day calculators on this site. Because the rule always puts it on a Monday, it can never land at a weekend, so it never needs an observed-date shift. The observed date is the one our business days calculator skips.

Martin Luther King Jr. Day in the years after 2029

The weekday never changes; only the date does, inside the January window the rule allows.

Every convention used above — whether the start date counts, how month ends are clamped, which holidays close an office — is written out on the methodology page, including how we count the 592 working days above.