Timestamp Converter

The number of seconds elapsed since January 1, 1970 UTC (the "epoch") — the universal way computers store moments in time, immune to time zones and date formats. Right now it's a ten-digit number a little over 1.7 billion.

It's in milliseconds — JavaScript and many APIs use ms. Up to ten digits reads as seconds; anything longer reads as milliseconds (a number that big can't sanely be seconds — it would mean year 2286+). The converter auto-detects.

Systems storing timestamps as signed 32-bit integers overflow on January 19, 2038, at 03:14:07 UTC — the timestamp exceeds 2,147,483,647 and wraps negative. Modern 64-bit systems are fine for the next 292 billion years.

A timestamp is an absolute moment; the two lines show that same moment expressed in your time zone and in UTC. Logs and databases usually speak UTC, which is why "the error happened at 3 PM" rarely matches what the log says.