keisoku

Date to Unix Timestamp Converter

Convert any date, time, and time zone (JST/UTC) into a Unix timestamp (epoch seconds) starting from January 1, 1970. Milliseconds, ISO 8601, and the UTC equivalent are shown at the same time.

Input

2026/06/25

Time zone of the entered date and time

Result

Unix time (epoch seconds)

1,782,313,200sec

Milliseconds (×1000)

1,782,313,200,000 ms

UTC date and time

2026/06/24 15:00:00

Input time zone

JST

Unix seconds (epoch seconds)1782313200
Unix milliseconds1782313200000
ISO 8601 (UTC)2026-06-24T15:00:00.000Z
UTC date and time2026/06/24 15:00:00

How it works

  • Unix time expresses a moment as the number of seconds elapsed since 00:00:00 on January 1, 1970, in Coordinated Universal Time (UTC). It is a standard format widely used for handling dates and times in programs and databases.
  • Enter a date and time, then choose whether that moment is Japan time (JST, UTC+9) or UTC, and the matching Unix seconds are calculated. When Japan time is selected, nine hours are subtracted internally to convert it to a UTC baseline.
  • Alongside the main Unix seconds result, the tool shows the value multiplied by 1000 in milliseconds, the ISO 8601 format (with the trailing Z), and the date and time converted to UTC, so you can use whichever fits your needs.
  • Time can be specified down to the second, not just hours and minutes. If you omit the seconds, they are treated as zero. This is useful for API testing and matching log timestamps.
  • Japan time (JST) is calculated as a fixed UTC+9 with no daylight saving time. Note that historical times and time zones for other regions are not supported.