Datum & Tid

Fixed Christian Feasts Calculator

Free Christian feast calculator. Find dates for fixed holidays like Christmas, Epiphany, and Annunciation for any year.

Movable Christian Feasts Calculator

Free Easter-based holy days calculator. Calculate movable Christian dates like Ash Wednesday, Pentecost, and Ascension.

Coptic Holy Days Calculator

Free Coptic holy days calculator. Find dates for fixed and movable Coptic Orthodox feasts and religious occasions.

Hebrew Holidays Calendar

Free Jewish holidays calendar. Find dates for Hebrew feasts and fasts including Rosh Hashanah, Yom Kippur, and Passover.

Holy Week Dates Calculator

Free Holy Week calculator. Find exact dates for Palm Sunday, Maundy Thursday, Good Friday, and Easter for any year.

Samaritan Calendar Converter

Free Samaritan calendar converter. Convert dates between Gregorian and Samaritan calendar systems online easily.

Samaritan Festivals Calculator

Free Samaritan festivals calculator. Find dates for religious holidays including Passover, Shavuot, and Sukkot.

Yazidi New Year Calculator

Free Yazidi New Year calculator. Find the date of Charshema Sor (Red Wednesday) and upcoming celebrations online.

Gregorian to Hijri Date Converter

Convert dates between Gregorian and Hijri calendars.

Date Difference Calculator

Calculate difference between two dates.

Age Calculator

Calculate your exact age.

Hijri to Gregorian Converter

Convert between Hijri and Gregorian dates.

Age Calculator (Years, Months, Days)

Exact age from birth date to any day, with borrow-correct months and days: born Jun 15, 1990, you are 36y 4m 1d on Oct 16, 2026. Handles leap years and Feb 29 birthdays.

Countdown Calculator

Live countdown in days, hours and minutes to any future date. Great for launches, exams and travel; works down to any date you pick, past or future.

Business Days Calculator

Counts calendar days minus weekend days, both endpoints included: Mon Oct 5 to Fri Oct 16, 2026 spans 12 calendar days and 10 business days on a Sat-Sun weekend. Fri-Sat weekend option included.

Work Days Calculator

Calculate work days between two dates (excluding weekends).

Pregnancy Week Calculator

Calculate current pregnancy week and stage.

Time Zone Converter (Offset Difference)

Convert a time across zones with one number: add the offset difference to the source time. 14:00 with a -5 h difference is 09:00, and a day indicator flags previous/next-day rollovers.

Detailed Age Calculator

Calculate your age in detail.

Advanced Sleep Cycle Calculator

Calculate optimal wake/sleep time.

Date Difference Calculator

Days between two dates, computed as end minus start in whole days: Jan 1 to Oct 16, 2026 is 288 days, about 9 months 15 days. Gives weeks, total hours and minutes too.

Day of Week Calculator

Weekday for any date, past or future, straight from the calendar: Jan 1, 2000 was a Saturday, and Oct 16, 2026 is a Friday. Also shows day-of-year and ISO week.

Lunar Age Calculator - Calculate Your Age in Hijri Calendar

Calculate your exact age in the Islamic Hijri calendar. Free lunar age calculator that shows your age in lunar years, months, and days.

Add Days to Date Calculator

Date arithmetic done on real calendar months: Oct 16, 2026 plus 45 days lands on Nov 30, 2026. Subtraction works the same way for deadlines and back-planning.

Time Duration Calculator

Elapsed time between two clock times: 09:15 to 17:45 is 8 h 30 min, or 510 minutes. Handles overnight shifts that cross midnight.

Ramadan Countdown

Calculate days remaining until next Ramadan.

Days Until Christmas Countdown

Calculate days remaining until next Christmas.

Minutes to Hours Converter

Convert minutes to hours and minutes.

Retirement Date Calculator

Adds your remaining years to your birth date: born Jun 15, 1990 and retiring at 65, your retirement date is Jun 15, 2055. Shows days remaining as well.

Date Adder

Add days, months, or years to a date.

Weekday Finder

Type any date and get its weekday instantly, e.g. Jun 15, 1990 was a Friday. Useful for verifying birthdates, receipts and historical events.

Retirement Countdown

Calculate time remaining until retirement.

Zodiac Sign Calculator

Calculate zodiac sign from birth date.

Period Cycle Calculator

Track menstrual cycle and predict next dates.

Work Hours Calculator

Calculate total work hours.

Advanced Date Difference

Calculate difference between two dates.

Islamic Hijri Date Converter

Convert between Gregorian and Hijri dates.

Unix Timestamp Converter

Convert Unix seconds to a UTC date and back: 1767225600 is Jan 1, 2026 00:00:00 UTC. Counts seconds since the epoch, Jan 1, 1970.

Hours to Days Converter

Convert hours to days, weeks, and months.

Week Number Calculator

ISO-8601 week number for any date: Oct 16, 2026 falls in week 42 of 2026. Weeks start Monday, and week 1 is the week holding the first Thursday of January.

Seconds to Hours Converter

Convert seconds to hours, minutes, and seconds.

Pay Period Calculator

Lists your next pay dates from a known anchor date and period: paid biweekly on Fridays with money landing Fri Oct 16, 2026, next cheques follow Oct 30, Nov 13, Nov 27.

Unix Epoch Converter

Convert between Unix timestamp and date.

Stopwatch Lap Calculator

Calculate lap times and splits.

Meeting Duration Calculator (Agenda Planner)

Meeting length from your agenda: items x minutes each + breaks. 8 items at 15 min with a 5-min break after every third item runs 2 h 05 m with 1 break.

Quarter Calculator

Calculate fiscal quarter and dates.

Hours Between Dates Calculator

Whole hours between two date-times: Oct 14 08:00 to Oct 16 12:00 is 52 hours. Also gives minutes and days for shift and travel planning.

Subscription Expiry Calculator

Calculate subscription expiry dates.