Date Tools
14 free online tools — Date diff, time zones, stopwatch & calendar tools
Explore our collection of 14 date tools. All tools are 100% free, fast, and process data locally in your browser for maximum privacy.
Date Difference
Calculate days, months & years between dates
Age Calculator
Calculate exact age & next birthday countdown
Day of Week
Find the day of the week for any date
Stopwatch
Precision stopwatch with lap recording
Countdown Timer
Set countdown timer with finish alert
Unix Timestamp
Convert Unix timestamps to readable dates
Add/Subtract Days
Add or subtract days from any date
Week Number
Find the ISO week number for any date
Business Days Calc
Count business days between two dates
Month Calendar
View full calendar for any month & year
Time Zone Converter
Convert time across all major time zones
Work Hours Calc
Calculate work hours with break deduction
Meeting Planner
Find common meeting time across time zones
Leap Year Checker
Check leap year — see previous & next leap years