Convert release timestamps
Turn ISO strings into Unix seconds, milliseconds, UTC, and local display values.
Free Datetime Tools
Convert timestamps, compare durations, inspect ISO weeks, shift time zones, and work with ICS snippets locally.
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Popular workflows
Measure elapsed time
Compare two dates and summarize days, hours, minutes, and seconds.
Prepare calendar snippets
Generate simple ICS events and parse calendar snippets for review.
Common tasks
- Convert ISO dates into Unix timestamps.
- Calculate duration between two dates.
- Find ISO week numbers for planning.
- Generate or inspect small ICS event snippets.
All tools in this topic
Date-time Converter Convert ISO dates, Unix timestamps, UTC, and local time values locally Duration Calculator Calculate elapsed time between two date-time values Week Number Converter Find ISO week numbers and week date ranges for a date Timezone Converter Convert a date-time value across common time zones in the browser iCal Event Generator Generate simple ICS calendar event text from event details iCal Parser Parse ICS calendar snippets into readable event fields Age Calculator Calculate age in years and days from dates Date Difference Calculator Calculate days between two dates locally Working Days Calculator Estimate weekdays between two dates in the browser
Frequently asked questions
Do datetime tools use remote APIs?
No. P1a datetime tools calculate locally in the browser.
Can I convert ISO dates to Unix time?
Yes. Date-time Converter outputs Unix seconds and milliseconds.
Can I calculate ISO week numbers?
Yes. Week Number Converter reports the ISO year and week.
Can I generate ICS text?
Yes. iCal Event Generator creates a simple calendar event snippet.