ClockZone

ClockZone is a free website for the time tasks that come up during work, study, exercise and travel. It brings a range of tools together so you can open the one you need in your browser.

Set a preset or custom timer for a focused session, use the stopwatch to record elapsed time and laps, or create a countdown to an event. For international schedules, compare city times with the world clock, convert between time zones and plan meetings across locations. Holiday calendars and date calculators help you check dates, calculate intervals, add or subtract time and count business days.

The collection also includes interval timers, multiple simultaneous timers and a chess clock. Developers and website authors can use the Unix timestamp converter, the visual Cron expression generator and embeddable clock and timer widgets.

Core tools are free to use without creating an account or installing software. The site works in desktop and mobile browsers and offers multiple language and regional versions.