Date converter tools

Calculate exact age in years, months, and days from a birth date. Updates to today or any target date.

Parse and format ISO 8601 dates. Convert between ISO strings, local datetime, and Unix timestamps.

Find the ISO week number for any date. See week start, week end, and year-week label.

Count the working days between two dates, skipping weekends, so a five day SLA or a 30 day payment term lands on the right calendar day.

Add up hours worked from start and end times across a week, subtracting breaks, so a timesheet total is arithmetic rather than guesswork.

Pick a target date and see exactly how many days, hours and minutes are left, useful for a launch, a deadline or a contract renewal.

Count the days between two dates, with a years-months-days breakdown, weeks, hours, and business days that skip weekends.