Elapsed vs inclusive
Elapsed days count the gap between two dates; inclusive days count both endpoints. The "Include start date" and "Include end date" toggles widen the counted range when your deadline or booking works that way.
Calendar or business days
One toggle switches the answer between calendar days and business days. Business mode skips Saturdays and Sundays, can exclude US federal holidays, and accepts your own custom exclusion dates.
A breakdown, not just a number
Every result shows total calendar days, inclusive days, weekdays, weekend days, and the span as weeks and days — and names exactly which holidays or custom dates were excluded. Copy the result or share the prefilled link.
How to count days between dates
- Enter the start date. Type or pick the first date. The Today button fills in today’s date.
- Enter the end date. Type or pick the second date. The order does not matter — an earlier end date still returns the absolute count.
- Choose calendar or business days. Use the mode toggle. Business days skip Saturdays and Sundays and can also exclude US federal holidays and custom dates.
- Set the inclusivity toggles. Include the start date, the end date, or neither, depending on whether your deadline counts its endpoints.
- Read the breakdown. The answer shows elapsed days, inclusive days, weekdays, weekend days, business days, and the span as weeks and days.
How many days since a past date
Days elapsed from each date below to today, September 11, 2026. Business days exclude Saturdays, Sundays and US federal holidays. Recomputed every night.
| Date | Weekday | Days since | In weeks | Business days |
|---|---|---|---|---|
| March 1, 2025 (03/01/2025) | Saturday | 559 | 79 weeks and 6 days | 385 |
| March 15, 2025 (03/15/2025) | Saturday | 545 | 77 weeks and 6 days | 375 |
| April 1, 2025 (04/01/2025) | Tuesday | 528 | 75 weeks and 3 days | 364 |
| April 15, 2025 (04/15/2025) | Tuesday | 514 | 73 weeks and 3 days | 354 |
| May 1, 2025 (05/01/2025) | Thursday | 498 | 71 weeks and 1 day | 342 |
| May 15, 2025 (05/15/2025) | Thursday | 484 | 69 weeks and 1 day | 332 |
| June 1, 2025 (06/01/2025) | Sunday | 467 | 66 weeks and 5 days | 321 |
| June 15, 2025 (06/15/2025) | Sunday | 453 | 64 weeks and 5 days | 311 |
| July 1, 2025 (07/01/2025) | Tuesday | 437 | 62 weeks and 3 days | 301 |
| July 15, 2025 (07/15/2025) | Tuesday | 423 | 60 weeks and 3 days | 292 |
| August 1, 2025 (08/01/2025) | Friday | 406 | 58 weeks | 279 |
| August 15, 2025 (08/15/2025) | Friday | 392 | 56 weeks | 269 |
| September 1, 2025 (09/01/2025) | Monday | 375 | 53 weeks and 4 days | 258 |
| September 15, 2025 (09/15/2025) | Monday | 361 | 51 weeks and 4 days | 249 |
| October 1, 2025 (10/01/2025) | Wednesday | 345 | 49 weeks and 2 days | 237 |
| October 15, 2025 (10/15/2025) | Wednesday | 331 | 47 weeks and 2 days | 228 |
| November 1, 2025 (11/01/2025) | Saturday | 314 | 44 weeks and 6 days | 215 |
| November 15, 2025 (11/15/2025) | Saturday | 300 | 42 weeks and 6 days | 206 |
| December 1, 2025 (12/01/2025) | Monday | 284 | 40 weeks and 4 days | 197 |
| December 15, 2025 (12/15/2025) | Monday | 270 | 38 weeks and 4 days | 187 |
| January 1, 2026 (01/01/2026) | Thursday | 253 | 36 weeks and 1 day | 175 |
| January 15, 2026 (01/15/2026) | Thursday | 239 | 34 weeks and 1 day | 166 |
| February 1, 2026 (02/01/2026) | Sunday | 222 | 31 weeks and 5 days | 155 |
| February 15, 2026 (02/15/2026) | Sunday | 208 | 29 weeks and 5 days | 145 |
| March 1, 2026 (03/01/2026) | Sunday | 194 | 27 weeks and 5 days | 136 |
| March 15, 2026 (03/15/2026) | Sunday | 180 | 25 weeks and 5 days | 126 |
| April 1, 2026 (04/01/2026) | Wednesday | 163 | 23 weeks and 2 days | 114 |
| April 15, 2026 (04/15/2026) | Wednesday | 149 | 21 weeks and 2 days | 104 |
| May 1, 2026 (05/01/2026) | Friday | 133 | 19 weeks | 92 |
| May 15, 2026 (05/15/2026) | Friday | 119 | 17 weeks | 82 |
| June 1, 2026 (06/01/2026) | Monday | 102 | 14 weeks and 4 days | 72 |
| June 15, 2026 (06/15/2026) | Monday | 88 | 12 weeks and 4 days | 62 |
| July 1, 2026 (07/01/2026) | Wednesday | 72 | 10 weeks and 2 days | 51 |
| July 15, 2026 (07/15/2026) | Wednesday | 58 | 8 weeks and 2 days | 42 |
| August 1, 2026 (08/01/2026) | Saturday | 41 | 5 weeks and 6 days | 29 |
| August 15, 2026 (08/15/2026) | Saturday | 27 | 3 weeks and 6 days | 19 |
| September 1, 2026 (09/01/2026) | Tuesday | 10 | 1 week and 3 days | 8 |
Need a date that is not listed? Browse every day of the last two years, or enter it in the calculator above.
How many days until an upcoming date
Days remaining from today, September 11, 2026, to each date below — with the same span expressed in weeks and in business days.
| Date | Weekday | Days until | In weeks | Business days |
|---|---|---|---|---|
| September 15, 2026 (09/15/2026) | Tuesday | 4 | 4 days | 3 |
| October 1, 2026 (10/01/2026) | Thursday | 20 | 2 weeks and 6 days | 15 |
| October 15, 2026 (10/15/2026) | Thursday | 34 | 4 weeks and 6 days | 24 |
| November 1, 2026 (11/01/2026) | Sunday | 51 | 7 weeks and 2 days | 35 |
| November 15, 2026 (11/15/2026) | Sunday | 65 | 9 weeks and 2 days | 44 |
| December 1, 2026 (12/01/2026) | Tuesday | 81 | 11 weeks and 4 days | 55 |
| December 15, 2026 (12/15/2026) | Tuesday | 95 | 13 weeks and 4 days | 65 |
| January 1, 2027 (01/01/2027) | Friday | 112 | 16 weeks | 76 |
| January 15, 2027 (01/15/2027) | Friday | 126 | 18 weeks | 86 |
| February 1, 2027 (02/01/2027) | Monday | 143 | 20 weeks and 3 days | 96 |
| February 15, 2027 (02/15/2027) | Monday | 157 | 22 weeks and 3 days | 105 |
| March 1, 2027 (03/01/2027) | Monday | 171 | 24 weeks and 3 days | 115 |
| March 15, 2027 (03/15/2027) | Monday | 185 | 26 weeks and 3 days | 125 |
| April 1, 2027 (04/01/2027) | Thursday | 202 | 28 weeks and 6 days | 138 |
| April 15, 2027 (04/15/2027) | Thursday | 216 | 30 weeks and 6 days | 148 |
| May 1, 2027 (05/01/2027) | Saturday | 232 | 33 weeks and 1 day | 159 |
| May 15, 2027 (05/15/2027) | Saturday | 246 | 35 weeks and 1 day | 169 |
| June 1, 2027 (06/01/2027) | Tuesday | 263 | 37 weeks and 4 days | 180 |
| June 15, 2027 (06/15/2027) | Tuesday | 277 | 39 weeks and 4 days | 190 |
| July 1, 2027 (07/01/2027) | Thursday | 293 | 41 weeks and 6 days | 201 |
| July 15, 2027 (07/15/2027) | Thursday | 307 | 43 weeks and 6 days | 210 |
| August 1, 2027 (08/01/2027) | Sunday | 324 | 46 weeks and 2 days | 221 |
| August 15, 2027 (08/15/2027) | Sunday | 338 | 48 weeks and 2 days | 231 |
| September 1, 2027 (09/01/2027) | Wednesday | 355 | 50 weeks and 5 days | 244 |
| September 15, 2027 (09/15/2027) | Wednesday | 369 | 52 weeks and 5 days | 253 |
| October 1, 2027 (10/01/2027) | Friday | 385 | 55 weeks | 265 |
| October 15, 2027 (10/15/2027) | Friday | 399 | 57 weeks | 274 |
| November 1, 2027 (11/01/2027) | Monday | 416 | 59 weeks and 3 days | 285 |
| November 15, 2027 (11/15/2027) | Monday | 430 | 61 weeks and 3 days | 294 |
| December 1, 2027 (12/01/2027) | Wednesday | 446 | 63 weeks and 5 days | 305 |
| December 15, 2027 (12/15/2027) | Wednesday | 460 | 65 weeks and 5 days | 315 |
| January 1, 2028 (01/01/2028) | Saturday | 477 | 68 weeks and 1 day | 325 |
| January 15, 2028 (01/15/2028) | Saturday | 491 | 70 weeks and 1 day | 335 |
| February 1, 2028 (02/01/2028) | Tuesday | 508 | 72 weeks and 4 days | 346 |
| February 15, 2028 (02/15/2028) | Tuesday | 522 | 74 weeks and 4 days | 356 |
| March 1, 2028 (03/01/2028) | Wednesday | 537 | 76 weeks and 5 days | 366 |
| March 15, 2028 (03/15/2028) | Wednesday | 551 | 78 weeks and 5 days | 376 |
Browse every upcoming date for the next two years, or see the holiday countdowns.
Days between common date pairs
The ranges people count most often — full years, calendar quarters, the US tax window and the school year — for 2026 and 2027. Elapsed days exclude the start date; inclusive days count both endpoints.
2026
| Date range | Elapsed days | Inclusive days | In weeks | Business days | What it covers |
|---|---|---|---|---|---|
| January 1 → December 31, 2026 | 364 | 365 | 52 weeks | 250 | The whole of 2026 |
| January 1 → March 31, 2026 | 89 | 90 | 12 weeks and 5 days | 61 | Q1 |
| April 1 → June 30, 2026 | 90 | 91 | 12 weeks and 6 days | 63 | Q2 |
| July 1 → September 30, 2026 | 91 | 92 | 13 weeks | 64 | Q3 |
| October 1 → December 31, 2026 | 91 | 92 | 13 weeks | 62 | Q4 |
| January 1 → June 30, 2026 | 180 | 181 | 25 weeks and 5 days | 124 | First half of the year |
| July 1 → December 31, 2026 | 183 | 184 | 26 weeks and 1 day | 126 | Second half of the year |
| January 1 → April 15, 2026 | 104 | 105 | 14 weeks and 6 days | 72 | US tax filing window |
| September 1, 2026 → June 15, 2027 | 287 | 288 | 41 weeks | 197 | A typical US school year |
| January 1, 2026 → January 1, 2027 | 365 | 366 | 52 weeks and 1 day | 250 | One full calendar year |
2027
| Date range | Elapsed days | Inclusive days | In weeks | Business days | What it covers |
|---|---|---|---|---|---|
| January 1 → December 31, 2027 | 364 | 365 | 52 weeks | 249 | The whole of 2027 |
| January 1 → March 31, 2027 | 89 | 90 | 12 weeks and 5 days | 61 | Q1 |
| April 1 → June 30, 2027 | 90 | 91 | 12 weeks and 6 days | 63 | Q2 |
| July 1 → September 30, 2027 | 91 | 92 | 13 weeks | 64 | Q3 |
| October 1 → December 31, 2027 | 91 | 92 | 13 weeks | 61 | Q4 |
| January 1 → June 30, 2027 | 180 | 181 | 25 weeks and 5 days | 124 | First half of the year |
| July 1 → December 31, 2027 | 183 | 184 | 26 weeks and 1 day | 125 | Second half of the year |
| January 1 → April 15, 2027 | 104 | 105 | 14 weeks and 6 days | 72 | US tax filing window |
| September 1, 2027 → June 15, 2028 | 288 | 289 | 41 weeks and 1 day | 198 | A typical US school year |
| January 1, 2027 → January 1, 2028 | 365 | 366 | 52 weeks and 1 day | 249 | One full calendar year |
Elapsed and inclusive days, side by side
These ranges work the same way in any year — elapsed days measure the gap, inclusive days count both the first and last date.
| Date range | Elapsed days | Inclusive days | Common use |
|---|---|---|---|
| January 1 to January 31 | 30 days | 31 days | Monthly reports, rental periods, and planning windows |
| June 1 to September 1 | 92 days | 93 days | Summer programs, quarterly plans, and project timelines |
| December 1 to December 25 | 24 days | 25 days | Holiday countdowns and event preparation |
Use a different date calculator
Days Since a Date
Pick a past date and read the elapsed days, weeks, and business days straight off the page.
Days Until a Date
Pick a future date for a countdown with weekday, weekend, and business-day totals.
Add Days to Date
Start with one date and add or subtract a specific number of days.
Business Days Calculator
Add business days to a date, or count them between dates with holiday exclusion.
Holiday Countdowns
See countdowns for holidays, seasons, and recurring events.
Printable Calendars
Need a printable calendar for this range? Free month, year, academic, and habit-tracker PDFs.
Days between dates FAQ
How do you calculate the number of days between two dates?
Enter a start date and an end date, keep the mode on Calendar days, and press Calculate. The big answer is the elapsed days — January 1 to January 2 is 1 elapsed day — and the breakdown below it shows inclusive days, weekdays, weekend days, business days, and the same span as weeks and days.
What is the difference between elapsed days and inclusive days?
Elapsed days measure the gap between the two dates, so the start date itself is not counted. Inclusive days count both the start date and the end date, so the inclusive total is always one more than the elapsed total. If you need the counted range itself to contain the first or last day, use the "Include start date" and "Include end date" toggles.
Does the day counter include both the start and the end date?
By default no: the count is exclusive of the start date and inclusive of the end date, which is the convention deadlines and notice periods use. Turn on "Include start date" to count both endpoints — the answer goes up by exactly one day.
How many days are in a year?
A common year has 365 days and a leap year has 366. 2026 is a common year, so it has 365 days. As of September 11, 2026, 253 days of 2026 have elapsed and 111 remain.
Which years are leap years, and why does it matter?
A year is a leap year when it is divisible by 4, except century years, which must also be divisible by 400 — so 2000 was a leap year and 1900 was not. The next leap years are 2028, 2032, 2036. It matters because any range that crosses February 29 is one day longer than a 365-day-year estimate suggests, which is why this counter walks the actual calendar instead of dividing.
How many days are between two months?
It depends on the months, because month lengths vary from 28 to 31 days. January 1 to February 1 is 31 days, February 1 to March 1 is 28 days (29 in a leap year), and April 1 to May 1 is 30. That is why an "about 30 days a month" estimate drifts by up to three days per month — enter the real dates instead.
How many business days are there between two dates?
Switch the mode toggle to Business days. The count then includes weekdays only, skipping Saturdays and Sundays, and can also exclude the 11 US federal holidays and any custom dates you add. For example, September 11, 2026 to December 31, 2026 is 111 calendar days but only 76 business days.
How do I count days between dates without counting weekends?
Business days mode does exactly that: it drops every Saturday and Sunday from the range. The result also reports the weekday and weekend totals separately, so you can see how many of each the range contained rather than trusting a single number.
Does the order of the dates matter?
No. If the end date is earlier than the start date, the calculator returns the absolute difference rather than a negative number, so you can enter the two dates in either order and get the same count.
How many weeks is a given number of days?
Divide by seven and keep the remainder: 100 days is 14 weeks and 2 days, 365 days is 52 weeks and 1 day, and 1,000 days is 142 weeks and 6 days. Every result on this page reports the span both ways so you never have to do that division yourself.
Which US federal holidays does the counter exclude?
All 11: New Year's Day, Martin Luther King Jr. Day, Washington's Birthday, Memorial Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day, and Christmas Day — each on its officially observed date, with the statutory Saturday-to-Friday and Sunday-to-Monday shift applied. The result names every holiday it removed so you can audit the count.
Can I share a calculation with someone?
Yes. After every calculation the page URL updates with your dates and options. Use the Copy link button to copy it — anyone who opens the link sees the same prefilled calculation.
Every figure on this page is computed from the calendar at build time and rebuilt nightly — see how we calculate.