Time & Date

Handle dates and time without manual counting: countdowns and stopwatches, a world clock, and calculators for business days, day-of-year, and week numbers. Each one works out the answer instantly and keeps whatever you enter on your own device.

Countdown Timer Free online countdown timer. Count down to any date or time with days, hours, minutes, and seconds. Fullscreen mode and sound alert included.

Stopwatch Free online stopwatch. Measure elapsed time with millisecond precision, lap recording, and split times. Perfect for sports, study, and workouts.

World Clock Free online world clock. Check current time in multiple cities and time zones worldwide with live updating, DST awareness, and 12h/24h format.

Day of Year Calculator Free online day of year calculator. Find the day number for any date, days remaining in the year, and leap year status instantly.

Week Number Calculator Free online week number calculator. Find the ISO week number for any date, plus US and Islamic week numbering systems.

Business Days Calculator Free online business days calculator. Count working days between two dates, excluding weekends and optional holidays.

In-Depth Guides

How to Find the Day Number of the Year (2026) How to Calculate Business Days Between Dates (2026) Working Days by Country: UK, US, Canada, Australia & NZ