📅 Date & Time

➕Add or Subtract Days from a Date Add or subtract any number of days from a date to find a new date, free online. 🎂Age at a Given Date Calculator Calculate someone's age on any past or future date, free online. 🎂Age Calculator — Exact Age in Years, Months, Days Calculate your exact age in years, months, days, weeks and hours from your date of birth. 💍Anniversary Calculator Calculate how long since an anniversary and the days until the next one, free online. 💼Business Days From Date Calculator Add or subtract business days (skipping weekends) from a date, free online. 🌍Business Hours Overlap (Time Zones) Calculator Find the working hours two offices in different time zones share, free online. ⏳Countdown Timer — Free Online Set a live countdown to any date and time, free online, no sign-up required. 📅Date Difference Calculator Calculate the number of days, weeks, months or hours between two dates, free online. 🎈Date of Birth From Age Calculator Work out the range of birth dates for someone of a given age today, free online. 📆Date Range Generator List every date between two dates daily, weekly, bi-weekly or monthly, with weekday filters, free online. 📆Day of the Week Calculator Find out what day of the week any date falls on, free online. 📆Days in a Month Calculator Find how many days are in any month of any year, free online. 🎉Days Until Weekend & Payday Calculator Count the days left until the weekend, Friday and your next payday, free online. 🎂Half Birthday Calculator Find your half birthday — exactly six months after your birthday — and how long until the next one, free online. 🔭Julian Date Converter Convert a calendar date to Julian Day Number, Julian Date, Modified Julian Date, day of year and ISO week, free online. 📞Meeting Time Planner (3 Time Zones) Calculator Convert one meeting time to the local time in three time zones at once, free online. 🏖️Retirement Date Calculator Find the date you reach retirement age and the time left until then, free online. ⏳Time Between Two Times Calculator Find the hours and minutes between two clock times, including across midnight, free online. 🪪Time Card Rounding Calculator Calculate paid hours from clock-in and clock-out times with a lunch break and 5, 6 or 15 minute rounding, free online. ⏱️Time Duration Calculator Calculate the time between a start time and an end time, including overnight spans, free online. 🌐Time Zone Converter Convert a date and time between two time zones using UTC offsets, free online. 🕒Timesheet Calculator — Hours Worked Calculate total hours worked across one or more shifts, free online. ⏱️Unix Timestamp Converter Convert between Unix timestamps and human-readable dates instantly, free online. 🗓️Week Number Calculator Find the ISO week number, day of the year and quarter for any date, free online. 💼Working Days Calculator — Business Days Between Dates Calculate the number of business days between two dates, excluding weekends. 🌍World Clock & Stopwatch See the live time in major cities around the world, plus a free online stopwatch.