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Jours entre deux dates

Comptez le nombre total de jours calendaires séparant deux dates.

Days between two dates

Comment ça marche

  1. Days are counted directly on the calendar, one date at a time, never by dividing a millisecond difference, which goes wrong across daylight saving changes.
  2. The toggle switches convention: end date excluded (Jan 1 → Jan 3 = 2 days) or both endpoints included (= 3 days). The active convention is always labeled.
  3. The business-day figure uses a standard Saturday–Sunday weekend with no holidays; for your own weekend and holiday rules, use the Business Days Calculator.

Bon à savoir

  • Enter the dates in either order: a reversed range is reported as such and the count stays meaningful.
  • Weekday counts include both endpoints regardless of the toggle, so the numbers can differ from the headline count by one.
  • Leap years and month boundaries are handled by the shared calendar engine (Feb 29 included).
Calculateurs de dates

Différence entre deux dates

Calculez l’intervalle précis entre deux dates en années, mois, semaines et jours.

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Calculateurs de datesEn vedette

Calculateur de jours ouvrés

Comptez les jours ouvrables entre deux dates ou ajoutez des jours ouvrés.

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Calculateurs de dates

Jours jusqu’à une date

Découvrez le nombre de jours restants jusqu’à un événement ou écoulés depuis une date.

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Calculateurs de dates

Ajouter ou soustraire des jours

Ajoutez ou retranchez des années, des mois, des semaines et des jours à une date donnée.

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Foire aux questions

Calendar days vs business days: which is shown?
Both. Calendar days count every date, whereas the business-day figure excludes your selected weekend days and any custom holidays you add.
Why not just divide the millisecond difference by 86,400,000?
Because that is wrong across daylight saving changes: some local days are 23 or 25 hours long. These calculators count calendar dates directly, so the result is right in every zone.
Is “from Jan 1 to Jan 3” two days or three?
Both are legitimate: 2 days elapsed, or 3 days inclusive of both endpoints. The toggle switches conventions, and the label always shows which is active.