Date & Time
33 free online calculators — instant results, no sign-up
HOTAge CalculatorExact age, days lived and birthday countdownDate Difference CalculatorDays, months and years between two datesDate CalculatorAdd or subtract days and workdays from a dateCountdown TimerDays, hours, minutes and seconds to a target dateWorkday CalculatorNumber of workdays between two datesTime Zone ConverterCurrent time across major world citiesWeekday CalculatorDay of the week for any dateHoliday CountdownCountdown to major Chinese festivalsChinese Lunar Calendar ConverterGregorian to lunar date with Ganzhi yearNEWSolar Terms Calendar24 solar terms with exact datesNEWChinese Zodiac CalculatorZodiac animal by birth yearWeek Number CalculatorISO week, day of year and year progressTime CalculatorAdd/subtract durations and find time differencesZodiac Sign CalculatorBirth date to star sign with dates and elementsDays Alive CalculatorDays lived plus your 10,000-day milestonesRetirement Age CalculatorChina 2025 delayed-retirement schedule and dateAnnual Leave CalculatorStatutory leave by tenure, proration and compensationWork Years CalculatorTenure in years/months/days and annual leave tierHours CalculatorDuration between times, overnight shifts, breaksLeap Year Checker4/100/400 rules, nearby leap yearsMoon Phase CalculatorLunar age, illumination, next full/new moonExam CountdownGaokao/postgrad exam days remainingSanfu (Dog Days) CalculatorDog days & Shujiu dates, Geng-day algorithmSunrise Sunset Calculator9 cities, day/night lengthBaby 100 Days CalculatorFull month, 100 days, milestonesSchool Age CalculatorAug 31 cutoff, full education timelineBusiness Days CalculatorCount or add working daysAnniversary CalculatorDay/year milestones timelineLunar Birthday CalculatorLunar to solar · next 10 yearsShichen (Chinese Hours)Time to shichen · aliases & zodiacTime Add & SubtractSum multiple durations · timecodes & splits · averageTime MultiplierDuration × multiplier · playback speed time · binge totalsShelf Life CalculatorExpiry date · days remaining · expiring/expired check