Get the current date and time instantly with our free live online clock. See the exact time in your local timezone and in UTC, the day of the week, and the real-time UNIX timestamp in milliseconds — all updating every second. Perfect for developers, system administrators, and anyone who needs an accurate, always-current world clock with no setup required.
A UNIX timestamp (also called epoch or POSIX time) counts the number of seconds — or milliseconds — that have elapsed since midnight on 1 January 1970 UTC, the so-called UNIX epoch. Because it is a single monotonic number with no timezone attached, it is the most reliable way to store and compare moments in time across systems, databases, and APIs. JavaScript's Date object works in milliseconds since the epoch, which is why this clock displays the value in milliseconds.
The same instant reads differently depending on where you are. UTC (Coordinated Universal Time) is the global baseline — it never observes daylight saving — while your local time applies your region's offset and DST rules. A timestamp of 1690000000000 ms is one exact moment, but it may show as 14:26 UTC and 19:56 in Kolkata on the clock at the same instant. Always store and transmit timestamps in UTC or as epoch milliseconds, and convert to local time only for display.
Two classic pitfalls catch developers out. First, the seconds-vs-milliseconds confusion: many APIs return seconds (10 digits), while JavaScript uses milliseconds (13 digits) — multiply or divide by 1000 to convert. Second, the Year 2038 problem: older 32-bit systems store seconds as a signed 32-bit integer that overflows in January 2038; 64-bit and millisecond-based systems are unaffected. To convert a specific moment, use the Date to Milliseconds tool, or reverse the process with Milliseconds to Date.