Date and time

Date differences, time zones, timers and calendars.

• Add or Subtract Days Add or subtract days, weeks, months or years from a date, in calendar days or business days with Canadian or US holidays. See each step of the calculation.
• Age Calculator Calculate your exact age in years, months and days from your date of birth, plus your age in months, weeks and days and the date of your next birthday.
• Business Days Calculator Count business days between two dates, excluding weekends and public holidays for Canada (federal, every province and territory) or the US federal calendar.
• Countdown Timer Create a live countdown to any date and time, in days, hours, minutes and seconds, and share it with a link. No sign-up, nothing stored on a server.
• Date Difference Calculator Count the days between two dates, and see the difference in weeks, months, years, weekdays and hours. Handles leap years and month ends correctly.
• Day of the Week Finder Find the day of the week for any date from year 1 to 9999, see the Zeller's congruence steps, and find out what day of the week you were born.
• Holiday Countdown See how many days are left until Christmas, Halloween, Easter, Canada Day, Thanksgiving, Mother's Day and other holidays, with a live countdown.
• Leap Year Checker Check if any year is a leap year with the Gregorian rule explained step by step, find the previous and next leap years and list all leap years in a range.
• Meeting Planner Plan a meeting across time zones. Compare everyone's working hours on an hour-by-hour grid, pick a slot and download it as an .ics calendar file.
• Online Alarm Clock Free online alarm clock that rings in your browser. Set several alarms with a label, repeat them daily or on weekdays, snooze, and pick the sound.
• Online Timer Free online timer with an alarm sound. Set minutes and seconds or pick a preset, see the time left in the tab title, and keep it running in the background.
• Pomodoro Timer Free Pomodoro timer with focus sessions, short and long breaks, sound alerts and optional desktop notifications. Customize every duration and cycle.
• Printable Calendar Generator Make a free printable calendar PDF for any month or year, in English or French, with week numbers and Canadian or US public holidays, on A4 or Letter paper.
• Sleep Calculator Find the best time to go to bed or wake up from 90-minute sleep cycles and the time it takes you to fall asleep. Free sleep cycle calculator, no sign-up.
• Stopwatch Free online stopwatch with laps, split times and keyboard shortcuts. Time to the hundredth of a second and export your laps to a CSV file.
• Sun and Moon Position Calculator Find the sun and moon altitude and azimuth for any place and time, with sunrise, sunset, twilight, solar noon, moonrise, moonset and the moon phase.
• Time Card and Hours Worked Calculator Free time card calculator for a full week. Enter start and end times and breaks, get total hours in h:mm and decimal, overtime and gross pay, and export a CSV.
• Time Duration Calculator Add and subtract hours, minutes and seconds, find the time between two clock times across midnight, and convert the result to decimal hours for timesheets.
• Time Zone Converter Convert a date and time from one time zone to several others at once, with daylight saving time handled automatically. Search any IANA time zone or city.
• Week Number Calculator Find the ISO 8601 week number of any date, the dates of any week and a table of all the weeks of a year, with US week numbering as an option.
• World Clock See the current time in several cities at once, with each city's UTC offset, daylight saving time status and whether it is day or night there.