Date-Time Converter with Timezone Support

Free online date-time converter to convert dates and times across timezones. Supports ISO 8601, RFC 2822, Unix timestamps, and relative time — powered by native Intl APIs.

Input Date-Time

Date-Time

Source Timezone

Target Timezone

Converted Results

ISO 8601

2026-07-20T00:48:31

RFC 2822

Mon, Jul 20, 2026, 00:48:31 GMT-4

Unix Timestamp (s)

1784522911

Unix Timestamp (ms)

1784522911000

Locale Format

07/20/2026, 00:48:31 EDT

Relative

1s ago

AI developer workflow fit

Use Date-Time Converter with Timezone Support while building with AI coding assistants, agents, and LLM workflows: validate generated output, transform payloads, debug integrations, and prepare reliable inputs without leaving your browser.

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What Is a Date-Time Converter?

A date-time converter translates a date and time from one timezone to another while presenting the result in multiple standard formats. This tool uses the browser's built-in Intl.DateTimeFormat API for accurate IANA timezone conversions — no external libraries required. Enter any date-time, choose a source and target timezone, and instantly see the converted result in ISO 8601, RFC 2822, Unix timestamps (seconds and milliseconds), locale format, and relative time.

How to Use the Date-Time Converter

Enter a date-time string in the input field (e.g., '2024-06-15T14:30:00'), or click 'Now' to use the current time.
Select the source timezone that the input date-time is expressed in.
Select the target timezone you want to convert to.
View the converted time in six formats: ISO 8601, RFC 2822, Unix seconds, Unix milliseconds, locale format, and relative time.
Click the copy button next to any result row to copy it to your clipboard.

Common Use Cases

Scheduling Across Timezones — Convert meeting times between offices in different timezones to avoid confusion when planning international calls or deployments.
API & Log Timestamp Translation — Translate timestamps from server logs or API responses in UTC into your local timezone for faster debugging.
Cron Job Verification — Verify that scheduled cron jobs configured in UTC will trigger at the intended local time.
ISO 8601 & RFC 2822 Formatting — Generate correctly formatted date-time strings for HTTP headers, email Date fields, or API request bodies.

FAQ

Which timezones are supported?

The tool includes 13 of the most commonly used IANA timezones spanning UTC, the Americas, Europe, Asia, Australia, and the Pacific. It uses the browser's native Intl API, so conversions respect DST rules automatically.

Does this tool handle Daylight Saving Time?

Yes. Because it relies on the browser's Intl.DateTimeFormat with IANA timezone identifiers, DST transitions are applied automatically based on the date you enter.

What date-time formats can I enter?

Any format parseable by the JavaScript Date constructor works, including ISO 8601 (2024-06-15T14:30:00), date-only strings (2024-06-15), and common forms like 'Jun 15 2024 14:30'. The input is interpreted in the selected source timezone.

Why do the Unix timestamps not change when I switch the target timezone?

Unix timestamps represent an absolute moment in time (seconds since the Unix epoch in UTC). They are identical regardless of which timezone the date is displayed in — only the human-readable formats change.