THE PASTEZAP TOOLKIT
Time & Date Tools
Compare time zones and convert dates and Unix timestamps.
Choose from 13 focused tools. Each page shows supported formats, practical examples and input limits before you begin. No account is required.
13 tools in Time & Date Tools
Time Zone Converter
Convert a date and local time between world time zones, including daylight saving.
Date & Duration Calculator
Find days between dates or add and subtract days from a calendar date.
Unix Timestamp Converter
Convert Unix seconds or milliseconds to UTC dates and back.
Age Calculator
Calculate calendar age in years, months and days on a chosen date.
Business Days Calculator
Count weekdays between dates with custom weekends and holidays.
Time Duration Calculator
Add or subtract durations in hours, minutes and seconds.
Leap Year Checker
Check a Gregorian leap year and list subsequent leap years.
ISO Week Calculator
Find the ISO week number, week-year and weekday of a Gregorian date.
Calendar Date Calculator
Add or subtract calendar days, weeks, months or years from a date.
Work Hours Calculator
Sum civil-clock shift hours after deducting breaks, with optional overnight shifts.
Time Unit Converter
Convert time quantities between explicitly defined units.
UTC Date Countdown
Track remaining time until a selected UTC date and time.
Stopwatch and Duration Timer
Measure elapsed time with pause/resume and laps, or run a duration countdown.