How the date tools count
- All math is on calendar dates, not hours, so daylight saving never makes a day go missing.
- "Days between" counts midnights crossed; a checkbox adds the end date where it matters.
- Calendar: Gregorian.
Athena Kits
Time, dates and calendars, made simple
The current time anywhere, time zone conversions, calendars with holidays, local weather and quick date calculators. Everything runs instantly in your browser: no sign-up, and nothing you type leaves your device.
Calendar
World Clock
Time Zones
Time Zone ConverterEST, PST, GMT, IST and any zone.Meeting PlannerFind a time that works across zones.Daylight Saving TimeWhen clocks change in the US, EU, Australia.US Time Zone MapThe six US zones, with the time now.Time Zone AbbreviationsEST, PST, GMT, IST and more.UTC Timestamp to LocalUnix or ISO 8601 timestamp to your time.Military Time24-hour time converter and chart.
Calendar
Calendars
2026 Calendar with Holidays2026 calendar with US holidays; switch to any year, print it.Printable CalendarFree PDF: whole year or month by month.Fiscal Year CalendarFiscal year and quarter by country.Biweekly Pay CalendarEvery payday and the three-paycheck months.Days Left in the YearDays, weeks and working days remaining.Working Days per MonthWith US federal holidays, any year.Week NumberISO 8601 week number for any date.Day of the WeekThe weekday of any date.Julian Date ConverterDay-of-year codes and Julian Day Numbers.
US holidays
US Federal HolidaysAll 11 with dates and observed days off.Mother's DaySecond Sunday in May.Father's DayThird Sunday in June.Memorial DayLast Monday in May.Independence DayThe Fourth of July.Labor DayFirst Monday in September.MLK DayThird Monday in January.Presidents' DayThird Monday in February.JuneteenthJune 19, the newest federal holiday.Columbus DaySecond Monday in October.Veterans DayNovember 11, every year.Valentine's DayFebruary 14, every year.
Holidays worldwide
Weather
Sun, Moon & Space
Sunrise & SunsetToday's sunrise, sunset and golden hour.Moon Phase TodayTonight's moon and a moon calendar.Moonrise & MoonsetWhen the moon rises and sets today.Full Moon CalendarEvery full moon, with its name.Equinox & SolsticeWhen each season starts.Solar & Lunar EclipsesEvery eclipse to 2040, and where.Day and Night MapWhere it is day and night now.
Timers
Timers & alarms
Online TimerCountdown timer with an alarm sound.StopwatchLap and split times to 1/100 s.Alarm ClockSet an alarm in your browser.
Countdowns
Countdown to Any DateA live, shareable countdown.Days Until ChristmasLive countdown to December 25.Days Until HalloweenLive countdown to October 31.Days Until ThanksgivingThe fourth Thursday of November.Days Until EasterEaster Sunday dates and countdown.Days Until New YearCountdown to January 1.New Year Around the WorldWho celebrates first and last.
Calculators
Date calculators
Days Between DatesDays, weeks and months between two dates.Age CalculatorExact age in years, months and days.Add or Subtract DaysThe date N days, weeks or months away.Business DaysWorking days between two dates.Age by Birth YearHow old you are if born in a given year.