Time & Date
Time tools split into two jobs that are easy to confuse: measuring time (clocks, timers, stopwatches) and computing with dates (differences, deadlines, timestamps, business days). Knowing which one you need saves a lot of fiddling.
Clocks, timers and alarms
The Timer handles countdown, stopwatch and Pomodoro in one place. Use the Alarm for a specific wall-clock time, the World Clock to see several zones at once, and the Time Zone Converter to find a meeting slot rather than just read the time.
Date arithmetic
Date Calculator adds and subtracts intervals. Date Difference measures the gap between two dates — including in weeks and business days. Working Days counts weekdays and excludes holidays, which is what contracts and SLAs actually mean by “days”. Timestamp Converter handles Unix epoch values.
Plan and track your time
The To-Do List and Habit Tracker are for capturing and repeating. Time Tracker records where time actually went; Time Blocking Planner and Eisenhower Matrix are for deciding what to do first — the matrix when you need to triage against urgency and importance.
Guides on this topic
Where this fits
These tools live under Time & Productivity in the main directory, and every tool page links back to this hub so you can see how it relates to the others.