Time

Exact age, date differences, and timezone or city conversions — including IST, JST, CET and other IANA zones with DST-aware offsets.

• Age calculatorCompleted years, months, and days from birth to today or any reference date using civil calendar rules.
• Time zone converterWall time in one IANA zone to another, including daylight-saving transitions encoded in the zone database.
• Days Between Dates CalculatorExact 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.
• Hours CalculatorEnter start and end times for each day, subtract unpaid breaks and get your total hours in hours:minutes and decimal, plus overtime and pay.
• What timezone is this city in?Resolve a city to an IANA zone, then convert times — handy when you remember the place, not the zone ID.
• Days Until CalculatorA live countdown to any date and time: days, hours, minutes and seconds left, plus the breakdown in years and months. Presets for New Year, Christmas and birthdays.