Days Until Date Calculator
Count the calendar days from today to any date, with weeks and days, years, months and days, weekdays left and the day of the week.
What is a days until date calculator?
This days until date calculator counts the calendar days between today and a date you choose: a birthday, a holiday, the last day of school, an exam, a trip or a deadline. Enter the date and it shows Days until (negative = days since), Weeks and days, Years, months and days, Weekdays (Mon–Fri) after today, up to and including the date, the target's Day of the week and Total hours.
"Today" means the date on your own device, in your own time zone. The count is in whole calendar days from today's date to the target date, so it stays the same all day and drops by one at midnight where you are. Someone in a different time zone can see a number one higher or lower for part of the day, because their calendar date is different. Choose a date in the past and the number turns negative, showing how many days have passed since.
The weekday count is the one to use for school and work countdowns, because it leaves out Saturdays and Sundays. It does not know about holidays, school breaks or your own days off, so subtract those yourself. All the examples on this page use fixed dates so you can check them; your own result depends on today's date when you open the page.
Formula
Days until
Days until = target date − today's date, counted in whole calendar days. Today is not counted and the target date is, so if today is Friday, October 16, 2026, then Saturday, October 17 is 1 day away. A February 29 inside the range is counted like any other day. Because the calculator compares calendar dates rather than clock times, a daylight-saving change does not shift the count.
Weeks and days
Whole weeks = days ÷ 7, rounded down; the leftover days are the remainder. For 101 days: 14 × 7 = 98, and 101 − 98 = 3, so 14 weeks 3 days.
Years, months and days
This is counted on the calendar from the earlier date to the later one: first the whole months (12 months make a year), then the days left over. Months are stepped one at a time from the earlier date, and when that day of the month does not exist in a shorter month, the last day of that month is used — so January 31, 2026 plus one month is February 28, and January 31 to March 1, 2026 is 1 month, 1 day. Because months run from 28 to 31 days, this breakdown cannot be found by dividing the day count by 30.
Weekdays left
The calculator counts the Monday-to-Friday dates from tomorrow through the target date. Every block of 7 days contains exactly 5 weekdays, so it takes 5 per full week and then checks the leftover days one by one. Today is never included; the target date is included when it falls on a weekday. For today or a past date this line shows a dash.
Total hours
Total hours = days × 24. It measures whole days from midnight to midnight, not the hours left from the current time of day, and it does not add or remove the hour that changes with daylight saving time.
Worked example
Example 1: New Year's Day, counted from October 16, 2026
- Today is set to Friday, October 16, 2026 and the target is January 1, 2027.
- Days left in October: 31 − 16 = 15. Add November (30), December (31) and January 1 (1): 15 + 30 + 31 + 1 = 77 days.
- Weeks and days: 77 ÷ 7 = 11 exactly, so 11 weeks, 0 days to go.
- Years, months and days: October 16 to December 16 is 2 months, and December 16 to January 1 is 16 days, giving 0 years, 2 months, 16 days to go.
- Weekdays: 11 full weeks × 5 = 55. Day of the week: Friday. Total hours: 77 × 24 = 1,848.
Example 2: the last day of a fall semester
Counting from Tuesday, September 8, 2026 to Friday, December 18, 2026:
- Days: 22 days to finish September, then 31 + 30 + 18 = 101 days, or 14 weeks 3 days, or 0 years, 3 months, 10 days to go.
- Weekdays: 14 full weeks give 70. Fourteen weeks after a Tuesday is Tuesday, December 15, and the 3 leftover days (Wednesday to Friday) add 3 more: 73.
- Those 73 weekdays include Wednesday, November 11 (Veterans Day) and Thursday, November 26 (Thanksgiving Day), both federal holidays in 2026, plus any break your school takes. Subtract the days your school is closed to get class days.
Example 3: a date in the past
Counting from October 16, 2026 back to Saturday, July 4, 2026: 27 days left in July after the 4th, then 31 + 30 + 16 = 104, so Days until shows −104. Weeks and days: 14 weeks, 6 days ago (14 × 7 = 98, plus 6). Years, months and days: 0 years, 3 months, 12 days ago, because July 4 to October 4 is 3 months and October 4 to October 16 is 12 days. The weekday line shows a dash for past dates.
Example 4: a weekend in between
From Friday, October 16, 2026 to Monday, October 19, 2026 is 3 days, but Weekdays shows 1: Saturday and Sunday are skipped, today is not counted and Monday, the target, is.
How to use this calculator
- Enter the Target date. The form starts at January 1, 2027; change it to any date, past or future.
- Read Days until (negative = days since). A positive number is days to go, a negative number is days that have passed, and 0 means the date is today.
- For longer countdowns, read Weeks and days or Years, months and days.
- For school or work countdowns, use the Weekdays line, then subtract holidays and breaks.
- Check that your device's date is correct, because the count starts from it. Come back on another day and the numbers update on their own.
Which number to use
- Days until for "how many days until" questions, travel and events.
- Weekdays for school days, workdays or study days left, after removing days off.
- Years, months and days for long countdowns such as a graduation or retirement date.
Common mistakes
- Counting both today and the target day. The calculator counts one of them; if your rule counts both, add 1.
- Treating the weekday count as school days without removing holidays and breaks.
- Reading Total hours as the time left right now; it counts whole days from midnight.
To count between two dates that do not include today, use the date difference calculator. To find the date a set number of days from now, use the date add / subtract calculator. For the counting rules behind both, read how to calculate the number of days between two dates.
Sources
Frequently asked questions
Does the count include today?
No. It counts from today's date to the target date, so tomorrow is 1 day away and the target date is the last day counted. If you want to count today as well (an inclusive count), add 1 to the result.
How many days are there until Christmas?
It depends on the day you ask, which is why the calculator counts from your device's date. As a fixed example, from Friday, October 16, 2026 to Friday, December 25, 2026 it shows 70 days, or 10 weeks 0 days, with 50 weekdays. Enter December 25 of the year you want and read the result for today.
Why does my friend see a different number?
The count starts from the calendar date in each person's own time zone. For the hours when it is already tomorrow in one place and still today in another, the two counts differ by one day. A device set to the wrong date also gives the wrong count.
What happens if I enter a date in the past?
Days until becomes negative and the weeks and the years-months-days lines say "ago". From October 16, 2026, July 4, 2026 shows −104, which is 14 weeks, 6 days ago. The weekday line shows a dash, because it only counts forward.
Are holidays left out of the weekday count?
No. Only Saturdays and Sundays are left out. Holidays that fall on a weekday, such as Thanksgiving Day on Thursday, November 26, 2026, are still counted, and so are school breaks. To count business days between two dates, use the working days calculator.
Why is Total hours not the time left right now?
It is days × 24, counted from midnight to midnight, so it ignores the current time of day. It also ignores daylight saving time. U.S. daylight saving time ends at 2:00 a.m. on the first Sunday of November, and that day has an extra hour where clocks change. From October 31 to November 2, 2026 the calculator shows 2 days and 48 hours, while 49 hours actually pass between those two midnights in places that change their clocks. Hawaii and most of Arizona do not observe daylight saving time.
Can it count down to a time of day, such as 5 p.m.?
No. It works with whole dates only, so every count runs from today's date to the target date with no clock time attached. To find the hours and minutes between two clock times on the same day or overnight, use the time duration calculator.
Does it count leap days?
Yes. February 29 is counted whenever it falls in the range. From October 16, 2026 to February 29, 2028 the calculator shows 501 days. A year is a leap year if it is divisible by 4, except century years, which must be divisible by 400, so 2028 is a leap year and 2100 is not.