Date & Time tools
Convert Unix timestamps, format dates, compare timezones, calculate durations and age, parse cron schedules and work with ISO 8601 — instantly and offline.
16 tools in this category · 4 sub-categories
Calculators
Duration Calculator
Calculate the difference between two dates, or add/subtract time.
Age Calculator
Calculate exact age and countdown to the next birthday.
Business Days Calculator
Count business days between two dates, excluding holidays.
Leap Year Checker
Check if a year is a leap year and find nearby leap years.
Work Hours & Timesheet Calculator
Total up work hours across shifts with breaks and hourly pay.
Day of Year Calculator
Convert a date to its day-of-year number, or back again.
Formatting & Cron
Date Formatter
Format a date using custom patterns and Intl presets.
Timezone Converter
Convert a datetime across multiple IANA timezones at once.
Cron Parser
Explain a 5-field cron expression and list upcoming run times.
Countdown Timer Generator
Live countdown to any date and time.
Stopwatch & Countdown Timer
Precision stopwatch with laps plus a countdown timer with alarm.
More Tools
Timestamps
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
ISO 8601 Converter
Convert dates and durations to and from ISO 8601 format.
Week Number Calculator
Find the ISO week number, day of year, and quarter for any date.
Epoch Batch Converter
Convert a list of Unix timestamps to readable dates in bulk.