Time & Date
37 Tools · Free Online Tool
Timestamp Converter
Convert Unix timestamps to dates and back.
Date Calculator
Add/subtract dates and calculate differences.
Timezone Converter
Convert time across world timezones.
Cron Parser
Parse cron expressions and show next runs.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin.
Chronometer
Precision stopwatch with lap times and millisecond accuracy.
Date Difference Calculator
Calculate the difference between two dates in years/days/hours.
Date Add/Subtract
Add or subtract years/months/days/hours/minutes/seconds from a date.
Countdown Timer
Countdown to a specified moment with notifications.
Pomodoro Timer
Pomodoro technique timer with work/break cycles.
World Clock
Display current time in multiple cities simultaneously.
Age Calculator
Calculate exact age from birthday and days to next birthday.
Interval Timer
Configurable work/rest interval cycling timer.
Alarm Clock
Set an alarm with browser notifications.
12h/24h Time Converter
Convert between 12-hour and 24-hour time formats.
Business Days Calculator
Calculate business days, excluding weekends and holidays.
Date Format Converter
Convert between ISO/US/EU/Chinese date formats.
ISO 8601 Validator
Validate if a string conforms to ISO 8601 date-time format.
Relative Time Generator
Generate '2 hours ago' style relative time (multilingual).
Time Ago Calculator
Calculate relative description of how long ago a time was.
Calendar Generator
Generate a calendar view for a specified month.
Leap Year Checker
Check if a year is a leap year and explain the rules.
Day of Week Calculator
Find which day of the week a date falls on.
Week Number Calculator
Calculate ISO 8601 week number for a date.
Lunar Calendar Converter
Convert between Gregorian and Chinese lunar calendar.
Julian Date Converter
Convert between Gregorian date and Julian Day Number (JDN).
Sleep Cycle Calculator
Recommend bed/wake times based on 90-minute sleep cycles.
Meeting Planner
Find suitable meeting times across timezones for all participants.
Duration Calculator
Calculate total duration of a time period (hours/minutes/seconds).
Natural Language Date Parser
Parse 'next Friday 3pm' style natural language dates.
Time Zone Map
Visualize world time zones and current times.
Daylight Saving Info
Query daylight saving start/end times for a timezone.
Deadline Calculator
Back-calculate milestone times from a deadline.
Timestamp Unit Converter
Convert between seconds/milliseconds/microseconds/nanoseconds timestamps.
Crontab Generator
Visually generate cron expressions and preview next runs.
iCal Event Generator
Generate .ics calendar event files for import.
Duration Formatter
Convert between ISO 8601 duration (PT1H30M) and readable text.