Pick any date to timestamp moment. ISO formatting keeps imports clean.
Enter HH:MM or HH:MM:SS. Seconds make date to timestamp handoffs precise.
Optional. Append fractional seconds when producing date to ms outputs.
Choose how the converter interprets your input before delivering date to sec and date to ms results.
We translate your date to timestamp request into unix seconds and unix milliseconds, then preview both timezone interpretations for quick verification.
Date to Timestamp Converter
Transform meeting invites, production schedules, or editorial deadlines into precise epoch numbers. This date to timestamp toolkit respects your timezone selection, outputs both date to sec and date to ms values, and packages everything into copy-ready summaries that anchor automation, reporting, and collaboration.
Choose the timezone before converting
The date to timestamp converter interprets the entered date, time, and milliseconds in Local or GMT / UTC mode. Local means the device’s timezone, not a separately selected city. UTC means a zero-offset clock reading.
For January 1, 1970 at 00:00:00 UTC, the result is 0 Unix seconds and 0 Unix milliseconds. One minute later is 60 seconds or 60,000 milliseconds. These counts identify instants measured from the Unix epoch.
Seconds, milliseconds, and ISO 8601
A whole Unix-second output drops the fractional second. Milliseconds preserve the entered millisecond field, and the ISO string ends in Z because it represents UTC. Preserve that distinction when sending values to an API.
New York is not always five hours behind UTC, and London is not always on UTC. A date-dependent offset is required. Local times in a daylight-saving gap can be normalized by the browser, while a repeated clock hour is ambiguous. Check the resulting UTC preview for those dates.
Copy a conversion, not a scheduled event
Use Copy Summary or an individual copy button to transfer the inputs and representations. The converter does not create an alarm, schedule a release, or confirm that an external system accepted the value.
To reverse the calculation, open Timestamp to Date and choose the same unit. Test an API’s sample value before transferring production data; confusing seconds with milliseconds changes the scale by 1,000.
Last updated: October 26, 2026