Convert, format, and calculate dates and times
44 tools available
Unix Timestamp Converter
Convert between Unix timestamps and readable dates
ISO 8601 Converter
Convert dates to various ISO 8601 formats
RFC 2822 Converter
Convert dates to/from RFC 2822 email date format
Epoch Converter
Convert between multiple epoch formats (seconds, ms, us, ns)
Date Formatter
Format dates using custom patterns (YYYY-MM-DD HH:mm:ss)
Date Parser
Parse various date string formats into components
Julian Day Converter
Convert between Julian Day Numbers and calendar dates
Excel Date Converter
Convert between Excel serial dates and calendar dates
Relative Time
Convert dates to relative time format (e.g., '2 days ago')
Date to Words
Spell out dates in written English form
Timezone Converter
Convert dates/times between timezones
UTC Converter
Convert between local time and UTC
Date Difference
Calculate the difference between two dates in various units
Date Add/Subtract
Add or subtract days, months, years from a date
Age Calculator
Calculate age from birthdate with detailed breakdown
Workdays Calculator
Calculate business days between two dates
Week Number
Get ISO week number from a date
Quarter Calculator
Get fiscal quarter from a date
Day of Year
Get the day number within the year for a date
Leap Year Checker
Check if a year is a leap year with detailed explanation
Days in Month
Get the number of days in a specific month
Date Range Generator
Generate a sequence of dates between start and end
Timezone List
List all major timezone names with current times
World Clock
Show current time in multiple cities around the world
Duration Calculator
Add and subtract time durations (HH:MM:SS format)
Duration Formatter
Format milliseconds to human-readable duration
Time Parser
Parse various time string formats into components
12h/24h Time Converter
Convert between 12-hour and 24-hour time formats
Countdown Calculator
Calculate time remaining until a specific date
Meeting Planner
Find overlapping business hours between timezones
Cron Builder
Build cron expressions with presets or custom fields
Cron Parser
Explain cron expressions in human-readable form
Cron Next Runs
Show next N execution times from a cron expression
Cron Validator
Validate cron expression syntax
Cron to English
Convert cron expressions to human-readable English
English to Cron
Convert natural language schedule descriptions to cron expressions
Rate Limiter Calculator
Calculate rate limiting parameters and conversions
Interval Calculator
Calculate time intervals, frequencies, and execution counts
Calendar Generator
Generate a text calendar for any month and year
Holiday Lookup
Look up US and international holidays by year
iCal Generator
Create .ics calendar file content for events
iCal Parser
Parse .ics iCalendar file content into events
vCard Generator
Create vCard (.vcf) contact file content
vCard Parser
Parse vCard (.vcf) contact file content