100 days from today
Count 100 days from today for a countdown, a 100-day plan or a milestone. See the weekday and the business days in between, then add the date to your calendar.
Today on your device. Pick another date to count from it instead.
Skips weekends and the holidays below. The start day itself isn't counted, so 1 business day after a Friday is Monday.
Marks holidays on the calendar and counts the business days in between.
- Nothing is uploaded
- Free, no sign-up
- Works on phone and desktop
How to find the date 100 days from today
- 1
The date 100 days from today shows at the top: 14 weeks and two days away.
- 2
Counting down to an event? Set the start date to the day your countdown begins.
- 3
Decide whether day 1 is the start day or the day after. The calculator counts tomorrow as day 1.
- 4
Add to calendar, then check milestones on the way, such as the 30- or 60-day marks.
The first 100 days
Judging a fresh start by its first 100 days goes back to Franklin D. Roosevelt's first months in office in 1933, when Congress passed a wave of New Deal laws. It has been a yardstick for new presidents ever since, and businesses borrowed it for the new manager's "100-day plan": listen, learn and deliver a few early wins. It's long enough to get something done and short enough to stay focused.
Worked example: day 100 of a presidency
The next US presidential term begins on Saturday, January 20, 2029. 100 days after that is Monday, April 30, 2029. But if you count inauguration day itself as day 1, day 100 is Sunday, April 29. That one-day gap between counting after a date and counting from it trips people up with every long count, so decide which one you need. This calculator counts after: tomorrow is day 1.
In working days, 100 business days from January 20, 2029 is Tuesday, June 12, 2029, more than 20 weeks later, once weekends, Presidents' Day and Memorial Day are skipped.
100 days of school
Many US elementary schools celebrate the 100th day of school. It counts school days, not calendar days, so it comes much later than 100 days after the first day of class, often in February. You can get close here by counting 100 business days from the first day of school, then adding the school's own breaks and teacher days, which aren't on any public holiday calendar.
100 days in other units
| 100 days is | Amount |
|---|---|
| Weeks | 14 weeks and 2 days |
| Weekdays | 70 to 72 |
| Months | About 3 months and 1½ weeks |
| Hours | 2,400 |
A 100-day countdown to a wedding, a launch or a race is easy to break into stages: check the 30-day and 60-day marks, or go further with 120 days from today.
Frequently asked questions
What date is 100 days from today?
It is shown at the top of this page. 100 days is 14 weeks and 2 days, so it falls two weekdays after today's: from a Monday, it is a Wednesday.
How many weeks is 100 days?
14 weeks and 2 days, or about 14.3 weeks.
How many months is 100 days?
A little over three months: three months and 8 to 11 days, depending on which months it covers.
When is the 100th day of school?
It depends on your school's calendar, because it counts school days, not calendar days. With weekends and breaks taken out, it often falls in February for schools that start in late August or early September.
Is the start day day 1?
Not in this calculator: tomorrow is day 1, so the 100th day is 100 days after the start. If you count the start day as day 1, your 100th day is one day earlier.
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