Date Time Parser

Date Time Parser is a browser-based utility for parsing, adjusting, and formatting date/time values. It defaults to UTC for inputs without a timezone and lets you inspect the same instant in other timezones.

Features

Parse ISO-style date/time strings, values with explicit offsets, RFC 9557-style strings with an IANA timezone tag, and Unix timestamps.
Treat date/time inputs without an explicit timezone as UTC.
Select from the browser's supported IANA timezones, with a fallback list for browsers that do not provide the timezone list API.
Keep the wall-clock time fixed or preserve the instant when changing timezones.
Edit the date and time directly, load the current instant, or shift it by preset or custom intervals.
View the active UTC offset, a DST indicator, and the Unix epoch value.
Copy the selected instant in formats including UTC ISO 8601, ISO with offset, PostgreSQL-style timestamps, RFC 9557-style timestamps, RFC 2822-style dates, and Unix epoch seconds or milliseconds.

Usage

Open datetimeparser.html in a browser. Paste a date/time string or Unix timestamp into the parser field and choose Parse. Use the date, time, and timezone controls to adjust the instant, or use the shift controls to move it forward or backward. Click a formatted value to copy it.

Privacy and dependencies

Date parsing and formatting run in the browser. The tool does not send entered date/time values to a backend and does not save them in browser storage.

The page has no runtime JavaScript framework or external CDN dependency. Its styling is a precompiled, local Tailwind utility stylesheet at assets/css/datetimeparser.css; the browser does not load or run Tailwind itself.

License

This project is licensed under the MIT License.

InnovUmabot | https://innovumabot.com

This tool was vibe-coded with AI with strict human supervision.