Calculatrices de dates et d’heures
Calculez écarts entre dates, âge, jours ouvrés, fuseaux horaires, horodatages Unix, semaines ISO et heures de lever et coucher du soleil.
15 calculatrices · 87 exemples vérifiés
Trouver le bon calcul
- Hours worked when the clocks change
Use dates and a time zone to distinguish clock readings from elapsed time, including repeated hours and unpaid breaks.
- A deadline that skips weekends and holidays
Add or subtract working days, choose the weekend pattern and supply the holidays that apply to your calendar.
- A meeting that works across time zones
Convert the meeting's actual date and compare working-hour overlaps, including seasonal changes in the time difference.
Dates
- Ajouter ou soustraire des jours à une date
Trouvez la date située un nombre de jours, semaines, mois, années ou jours ouvrés avant ou après une date de départ, avec le jour de la semaine et le décalage en jours calendaires.
- Calculateur d’âge
Calculez l’âge exact à une date donnée en années, mois et jours, à partir de la naissance, avec le prochain anniversaire et l’âge en mois, semaines, jours et heures.
- Calculateur de jours entre deux dates
Calculez l’intervalle entre deux dates en jours, années, mois, semaines ou heures, ainsi que les jours ouvrés hors week-ends et jours fériés de votre choix.
- Business days calculator: add working days to a date
The deadline N business days after or before a start date, skipping weekends and the holidays you list, with the calendar days it spans.
Temps
- Compte à rebours jusqu’à une date
Affichez en direct les jours, heures, minutes et secondes jusqu’à une date et heure, ou depuis celles-ci, dans tout fuseau horaire, en tenant compte des changements d’heure.
- Hours calculator: hours between two times and weekly timesheet
Calculate work hours, breaks and weekly timesheets. Use dates and a time zone for overnight shifts across daylight-saving changes and repeated hours.
- Military time converter (24-hour time)
Military time converter: 12-hour to 24-hour time and back, how it is spoken, time-zone letters with the Zulu equivalent, and a full-day chart.
- Conversion de fuseaux horaires et planification de réunions
Convertissez une heure vers l’heure locale de 12 autres fuseaux au maximum, avec les changements d’heure d’été et une grille de planification des réunions.
- Unix timestamp converter
Unix timestamp converter: epoch seconds, milliseconds, microseconds or nanoseconds to an ISO 8601 UTC date and local time, and dates back to epoch time.
- Time calculator: add and subtract hours and minutes
Add and subtract hours, minutes and seconds from a list of durations, with the total as H:MM:SS, decimal hours, minutes and seconds.
Calendrier
- Calendar converter (Hijri, Hebrew, Persian, Julian)
Convert a Gregorian date to Hijri (Umm al-Qura and tabular), Hebrew, Persian, Indian national (Saka) and Julian dates, or a Julian date back.
- Day of the week calculator
Day of the week for any date, past or future: the weekday in the Gregorian calendar, worked through step by step with Zeller's congruence.
- Leap year checker
Leap year checker: whether a year has 366 days under the Gregorian rule, which test decides it, and the previous and next leap years.
- Week number and day of year
Week number for any date: ISO 8601 week and week-numbering year, US week number, day of the year, days left in the year and the quarter.
Soleil et ciel
Choisir une calculatrice : Date et heure
Calendar dates or elapsed time?
A date difference counts calendar boundaries; elapsed hours compare instants. Choose the date tool for days between events, the age tool for completed years and months, and the hours tool for shifts or timesheets. Decide whether to include the first or last day. For a deadline, choose working days and supply the weekend pattern and holidays that apply to your organization. A holiday calendar from another region can produce a plausible but incorrect due date.
Use the event's date and time zone
Clock readings can repeat or disappear when daylight-saving time changes. Enter the actual dates and named time zone when you need elapsed time across such a change. A fixed UTC offset describes one offset, not a region's seasonal rules. Unix timestamps represent instants; confirm whether your source counts seconds or milliseconds. For recurring meetings, compare more than one date because different regions change their clocks on different schedules.
Hours across clock changes · Meeting planner · Unix timestamps
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