Date calculator
From to is how many days?
days after is which date?
days before is which date?
business days after is which date?
How to count days between two dates
- Leave out the start date and count the end date: Monday to Friday of one week is 4 days.
- Add 1 if both dates count, as for a trip or a hotel stay (5 days).
- Business days: count the same days, Monday to Friday only, minus federal holidays observed on a weekday.
Days after January 1, 2027
| After Jan 1 | Date | Weekday | Business days |
|---|---|---|---|
| 7 days | Jan 8 | Friday | 5 |
| 14 days | Jan 15 | Friday | 10 |
| 30 days | Jan 31 | Sunday | 19 |
| 45 days | Feb 15 | Monday | 29 |
| 60 days | Mar 2 | Tuesday | 40 |
| 90 days | Apr 1 | Thursday | 62 |
| 100 days | Apr 11 | Sunday | 68 |
| 120 days | May 1 | Saturday | 83 |
| 180 days | Jun 30 | Wednesday | 124 |
| 365 days | Jan 1 | Saturday | 249 |
Days from New Year's Day to each federal holiday, 2027
| Holiday | Date | Days | Weeks |
|---|---|---|---|
| Martin Luther King Jr. Day | Jan 18 | 17 | 2 weeks and 3 days |
| Washington's Birthday | Feb 15 | 45 | 6 weeks and 3 days |
| Memorial Day | May 31 | 150 | 21 weeks and 3 days |
| Juneteenth National Independence Day | Jun 19 | 169 | 24 weeks and 1 day |
| Independence Day | Jul 4 | 184 | 26 weeks and 2 days |
| Labor Day | Sep 6 | 248 | 35 weeks and 3 days |
| Columbus Day | Oct 11 | 283 | 40 weeks and 3 days |
| Veterans Day | Nov 11 | 314 | 44 weeks and 6 days |
| Thanksgiving Day | Nov 25 | 328 | 46 weeks and 6 days |
| Christmas Day | Dec 25 | 358 | 51 weeks and 1 day |
Counting from today: days from today (90 days, 30 days ago), days left in the year and what day of the year it is.
Frequently asked questions
How do you count the days between two dates?
Subtract the earlier date from the later one: the start date is not counted, the end date is. January 1 to December 25, 2027 is 358 days (51 weeks and 1 day). Count both dates and it is 359.
What date is 90 days after Mar 15, 2027?
Sunday, June 13, 2027. Count forward 90 days from Mar 15, not counting Mar 15 itself. 30 days before Jul 4 is Friday, June 4, 2027.
How many business days are between two dates?
Count Monday to Friday and leave out federal holidays observed on a weekday. January 1 to December 25, 2027 has 245 business days. 10 business days after Nov 19 is Monday, December 6, 2027, because Thanksgiving is skipped.
Does the calculator count leap days?
Yes. 2027 has 365 days and 2028 has 366, so February 1 to March 1, 2028 is 29 days, one more than in 2027.