Days Between Dates Calculator
Exact span between two dates and times: years, months, days, hours, minutes and seconds, plus totals in every unit. Time zones and daylight saving time are handled for you.
Defaults to your browser's zone. Daylight saving time is applied from the IANA time-zone database.
Result
364 days
Calendar days
- Breakdown11 months, 30 days
Total in each unit
- Days364
- Weeks52
- Hours8,736
- Minutes524,160
- Seconds31,449,600
How this result is calculated
- Start: Thursday, January 1, 2026
- End: Thursday, December 31, 2026
- Whole months are added to the start while they still fit before the end (11 months), then the remaining days and clock time.
- Elapsed time = end instant − start instant = 31,449,600 seconds
- Weeks = 364 ÷ 7 = 52 · 52 weeks
About this tool
How it works: both dates (and optional times) are read as wall-clock time in the time zone you choose and turned into exact instants with the IANA time-zone database built into your browser. The calendar breakdown adds whole months to the start date while they still fit before the end, then counts the remaining days, hours, minutes and seconds. A month added to 31 January ends on the last day of February.
Calendar days vs. elapsed hours: a day is counted from one midnight to the next, so the day clocks change still counts as one day. Total hours, minutes and seconds use the real elapsed time, so a span across a spring-forward night has one hour less than 24 × days, and the calculator tells you when that happens.
Include the end date when both the first and the last day count (leave, a hotel stay, a contract term). Business-day mode skips weekends and, if you pick a country, its public holidays and bridge days, while transferred working Saturdays count as workdays. To count down to a single date, use the days until calculator; for age from a birth date use the age calculator, and for shift times the hours calculator.
Formula
elapsed = end instant − start instant (UTC, DST-aware)calendar days = (end date − start date) in midnightsY M D = whole months added to start while ≤ end, then days and clock timeweeks = days ÷ 7hours = elapsed ÷ 3 600 s · minutes = elapsed ÷ 60 sinclude end date: end + 1 daybusiness days = days − weekend days − public holidays on workdays
How it is calculated
- Pick the start and end date; use Today to fill in the current date.
- Optionally tick “Add a time of day” and set hours, minutes and seconds in 24-hour or 12-hour format.
- Choose the time zone (your browser's zone is preselected) so daylight saving time is applied correctly.
- Tick “Include the end date” if the last day counts too.
- Turn on business days and pick a country to skip weekends and public holidays.
- Read the breakdown, the totals in each unit and the step-by-step method; copy the shareable link to send the exact result.
Questions
How many days are there between two dates?
Count the midnights from the start date to the end date: from 1 January to 31 December 2026 that is 364 days. If both the first and the last day count, add one day (365). The calculator does both with the “Include the end date” switch.
Does daylight saving time change the result?
Not the day count, but the hours. In Riga, 29 March 2026 has only 23 hours, so 29 → 30 March is 1 calendar day but 23 elapsed hours. The calculator uses your time zone's real rules and shows a note when a DST shift is included.
How are business days counted?
Every date from the start date up to the day before the end date (or the end date itself if included) is checked: weekend days are skipped, and with a country selected so are its public holidays and bridge days. Transferred working Saturdays count as workdays. Holiday data covers 2026–2027; other years use weekends only.
Why is 31 January + 1 month the end of February?
February has no 31st, so the day is clamped to the month's last day (28 or 29). That is how contracts, ISO 8601 durations and most date libraries add months. 31 January → 1 March 2026 is therefore 1 month and 1 day.
Can I share the exact calculation?
Yes. “Copy shareable link” puts the dates, times, time zone, clock format and business-day settings into the page address. Whoever opens it sees the same result; nothing is stored on a server.