Dates & Time

Create a text calendar for any month and year

Compute time remaining until any target date

Convert dates to all ISO 8601 representations

Create a sequence of dates between start and end dates

Explain cron expressions in human-readable form

Add up total hours worked from a list of clock in and clock out times, with breaks and overtime at 1.5x

Create .ics calendar file content for events

Browse all major IANA timezone names with current local times

Parse any date string format into year, month, day

Compute exact age from birthdate

Compute rate limiting parameters and conversions

Work out sunrise, sunset, solar noon and day length in UTC for a latitude, longitude and date

Parse vCard (.vcf) contact file content into structured data

Parse any time string format into hours, minutes

Convert between Excel serial date numbers and calendar dates

Find how many days are in any month

Check cron expression syntax for errors

Find the ISO week number for a date, or the dates a given ISO week covers

Create vCard (.vcf) contact file content

Convert milliseconds to human-readable duration

Convert dates to and from RFC 2822 email date format

Compute the gap between two dates in years, months, weeks, and days

Turn natural language schedule descriptions into cron expressions

Work out the phase of the moon, its illumination and the next full and new moon for a date

Parse .ics iCalendar file content into event details

View current time in multiple cities around the world

Convert dates and times between IANA timezones

Determine the fiscal quarter for any date

Preview upcoming execution times for any cron expression

Work out the hours and minutes between two times, including a shift that crosses midnight

Find US and international holidays for any year

Convert between 12-hour and 24-hour time formats

Format dates using custom patterns like YYYY-MM-DD HH:mm:ss

Get the ISO week number for any date

Translate cron expressions to plain English

Add and subtract time durations in HH:MM:SS format

Convert between Unix timestamps and human-readable dates

Find the day number within the year for any date

Compute time intervals, frequencies, and execution counts

Find overlapping business hours between timezones

Convert between Julian Day Numbers and calendar dates

Check if any year is a leap year with detailed explanation

Create cron expressions with presets or custom fields

Convert between Unix seconds, milliseconds, microseconds

Add or subtract days, months, and years from any date

Convert dates to human-readable relative format like '2 days ago'

Count business days between two dates

Spell out any date in written English form

Convert between local time and UTC