Uses the browser's built-in Intl API with the IANA timezone database, which accounts for each region's specific DST rules and stays current as vendors update it.
Free Developer Tool
Timestamp & World Time Converter
Convert Unix timestamps to dates and back, and see any time converted across timezones simultaneously — enter "22 Sept 2026, 5:00 AM UTC" and instantly see what that is in IST, China, US, and anywhere else.
- ✔ Live Unix timestamp
- ✔ Timestamp ↔ date, both directions
- ✔ Multi-timezone conversion grid
- ✔ DST-aware
- ✔ Free Forever
Never Miscalculate a Timezone Again
Server logs, cron schedules, and API timestamps run on Unix time — seconds since January 1, 1970 UTC — while humans think in local dates and clock times, and different teammates think in completely different local clocks. This tool covers both problems: convert a raw Unix timestamp to a readable date and back, or take one specific time someone mentioned (like a maintenance window announced in UTC) and see it translated into every timezone your team actually works in, all at once, with full DST handling.
How It Works
1. Pick a Tool
Unix Timestamp Converter, or World Time Converter.
2. Enter a Time
A timestamp, a specific date, or leave it live for "right now".
3. See Every Format
ISO, UTC, relative time — or a full grid of world timezones.
4. Copy What You Need
Copy any individual value with one click.
Timestamp → Date
Date → Timestamp
Timezone Reference
Common Timezone Offsets from UTC
| Region | Timezone | Standard Offset | Observes DST |
|---|---|---|---|
| India | IST (Asia/Kolkata) | UTC+5:30 | No |
| China | CST (Asia/Shanghai) | UTC+8:00 | No |
| Japan | JST (Asia/Tokyo) | UTC+9:00 | No |
| UK | GMT/BST (Europe/London) | UTC+0:00 | Yes (BST in summer) |
| US East Coast | ET (America/New_York) | UTC-5:00 | Yes (EDT in summer) |
| US West Coast | PT (America/Los_Angeles) | UTC-8:00 | Yes (PDT in summer) |
| UAE | GST (Asia/Dubai) | UTC+4:00 | No |
| Singapore | SGT (Asia/Singapore) | UTC+8:00 | No |
| Australia (Sydney) | AEST/AEDT (Australia/Sydney) | UTC+10:00 | Yes |
| Central Europe | CET/CEST (Europe/Berlin) | UTC+1:00 | Yes |
Note: This tool uses your browser's built-in timezone database (via the
Intl API), which is automatically kept up to date by browser vendors — including
historical and future DST rule changes, so conversions stay accurate even when
a country changes its DST policy.
FAQsTimestamp & World Time Converter
How accurate is the conversion around DST changes?
What is a Unix timestamp?
The number of seconds since January 1, 1970 UTC — timezone-independent by design, which is why servers and APIs use it internally.
Does India or China observe daylight saving time?
No. Both IST (UTC+5:30) and China Standard Time (UTC+8:00) are fixed year-round with no DST, making them useful reference points.