Time & Date Tools

Clocks, timers, duration converters and date math — powered by our dedicated time-and-date site, ddhhmmss.com.

These tools open on our sister site ddhhmmss.com, which specialises in this area. Links open in a new tab.

Convert a time across cities and time zones around the world.

Add up hours and minutes worked between a start and end time.

Add or subtract hours, minutes and seconds.

Find which weekday any past or future date falls on.

Convert between Unix epoch timestamps and human dates.

Convert between 24-hour military time and 12-hour clock.

Turn a number of seconds into hours, minutes and seconds.

Convert milliseconds into a readable time duration.

Convert a minute count into hours, minutes and seconds.

Count down to any date, event or deadline.

Check whether a year is a leap year and list nearby ones.

Work out ideal bed or wake times based on sleep cycles.

Convert dates between different calendar systems.

See the current time in cities across the globe at a glance.