Date & Time Calculators

Free tools to help you calculate dates, countdowns, and time conversions.

Popular Tools

Calculate the time between any two dates with optional time inputs.

Convert between seconds, minutes, hours, days, weeks, and years.

Countdown to any holiday — Christmas, Thanksgiving, Diwali, and more.

Create a countdown to any important date. Pick a date and optionally a time to see exactly how many days remain.

Calculators and utilities for dates and times.

Count down to holidays worldwide.

Convert between any time units.

Calculate time between dates.