Time & Date
Time & date utilities.
Convert Unix timestamps, work out an age or a duration, and move a moment across time zones — the date arithmetic that spreadsheets make fiddly, done in your browser. Nothing is uploaded.
TIME · 01
Timestamp
NewUnix ↔ human date.
Runs in your browser · no upload
TIME · 02
Age Calculator
NewExact age from a birth date.
Runs in your browser · no upload
TIME · 03
Date Duration
NewDays & months between dates.
Runs in your browser · no upload
TIME · 04
Time Zone Converter
NewOne moment, across zones.
Runs in your browser · no upload
TIME · 05
Week Number
NewISO week number for a date.
Runs in your browser · no upload
TIME · 06
Business Days
NewCount weekdays between two dates.
Runs in your browser · no upload
TIME · 07
Add Days to Date
NewAdd or subtract days, weeks or months.
Runs in your browser · no upload
FAQ
- Do these date tools run offline?
- Yes — every time & date tool here computes in your browser, so nothing is uploaded.
- Are time zones handled correctly?
- The converter renders one instant across zones with the Intl API, which applies each zone’s DST rules for you.