Convert Unix Epoch timestamps to standard human-readable dates and back. Create and manage your own list of custom timestamps.
How it Works & Formula
Converts Unix epoch numbers into standard human-readable dates and formats (UTC, Local, ISO 8601) and parses standard dates back to epoch time.
Practical Examples
Convert `1718553600` to its human-readable equivalent: Sunday, June 16, 2024.
Convert a custom date/time to a Unix timestamp in seconds or milliseconds for use in coding projects.
Frequently Asked Questions
Unix time (or Epoch time) is a system for describing a point in time, defined as the number of seconds that have elapsed since 00:00:00 UTC, Thursday, 1 January 1970.
If the input value is greater than 100,000,000,000, the calculator automatically detects it as milliseconds (JS-resolution) instead of seconds.
Unix time is design-simplified to increase by exactly 86,400 seconds per day. When a leap second is added to UTC, the Unix clock repeats the last second of the day to stay in sync.
Systems using signed 32-bit integers to store Unix timestamps will overflow on January 19, 2038, wrapping the time back to 1901. Modern systems resolve this by transitioning to 64-bit integer timestamp representations.
The calculator automatically parses the UTC epoch timestamp and uses your web browser's local timezone settings to format and display the matching local time.
ISO 8601 is an international standard for date and time representation (e.g., YYYY-MM-DDTHH:mm:ss.sssZ). It is widely used in software development for standardized, timezone-explicit data exchange.