Project planning
Measure how many working days sit between kickoff and launch.
Convertisseur d'unités
Calculateur de durée de date
Mesurez la durée entre deux dates, en secondes.
Choisissez une date de début et une date de fin pour voir instantanément la durée de l'intervalle en jours, semaines, mois, années et unités courantes adaptées aux jours ouvrables.
Calendar-day difference
Date after or before N days
Weekdays only vs business days with holidays
Count days between dates
Pick a start and end date to measure the calendar span. Results use standard “between dates” semantics, so the same day returns 0 days.
Quick planning presets
Set the end date from the start date with one tap for common planning horizons.
Days between your dates
There are 30 calendar days between 27 févr. 2026 and 29 mars 2026.
Months and years are approximate so you can estimate longer timelines quickly.
Calendar days
30
Weekdays only (Mon–Fri)
20
Counts weekdays after the start date up to the end date.
Selected workweek days
20
Mon-Fri
Business days with holidays
20
Starts from the weekday count, then removes national public holidays for the selected country.
Weeks (exact)
4,29
Months (approx.)
0,99
Years (approx.)
0,082
Excluded holidays
No holiday dates were excluded for the current range and workweek.
Add or subtract days from a date
Find the date after 7, 30, or 90 days, or move backward from a deadline to a planning start date.
Offset shortcuts
Use positive values for future dates and negative values for past dates.
+30 days from 29 mars 2026 is 28 avr. 2026.
Resulting date
28 avr. 2026
Day of week
mardi
Weekdays and business days
Compare the raw weekday count with a holiday-aware business-day count so you can plan staffing, approvals, shipping, and project schedules more accurately.
The holiday-aware count uses public holidays for the selected scope.
Optional. Use a more specific holiday scope when your planning depends on state-level public holidays.
Custom workweek
Pick the weekly schedule that matches your team, operation, or market before holidays are removed.
United States
Public holidays can be filtered by the selected holiday scope. Company shutdowns and custom leave calendars are not included.
2026
When this date calculator helps most
Shipping and procurement
Check whether a quoted lead time includes weekends or public holidays.
HR and operations
Count business days across notice periods, onboarding windows, or approval timelines.
Foire aux questions
Les années bissextiles sont-elles prises en compte ?
Oui. Le calculateur compte les jours calendaires réels, de sorte que les jours bissextiles et la durée des mois sont automatiquement inclus.
Comment les jours ouvrables sont-ils calculés ?
Le total des jours ouvrables inclut du lundi au vendredi et exclut les samedis et dimanches. Les jours fériés ne sont pas retirés.
Puis-je mesurer le temps à rebours ?
Absolument. Si la date de fin est antérieure à la date de début, l'outil les inverse automatiquement et renvoie toujours la durée positive.