Free online utilities to convert, calculate, and transform.

Unixtime converter

Use the following form to convert to and from any unix time to local time or UTC.

Local time:
/ / - : :

UTC time:
/ / - : :

* Format: Year / Month / Day - Hour : Minute : Second

Unix Timestamp

Utility to view and convert unix times.

Seconds since epoch
01 January 1970

Unixtime stamp formatted into different time standards:

Standard Date
ISO 8601
ISO 2822
RFC 3339

What is a unixtime, epoch time, or POSIX time stamp?

Unix time is the number of seconds that have elapsed since the Unix epoch, minus leap seconds.

The Unix epoch was set at 00:00:00 UTC on the 1st of January 1970, and each leap second has teh same time as the second before it.

Every day is treated as if it contains exactly 86400 seconds, and because of this Unix time is not a true representation of UTC.

Since solar year comprises precisely of 365 days, 5 hours, 48 minutes, and 45.25 seconds the gregorian calendar has exactly 365.2425 days.

Human Description Time Seconds
1 hour 3600 seconds
1 day 86400 seconds
1 week 604800 seconds
1 Month 2629746 seconds
1 Year 31556951 seconds
† Equivalent to 30.436875 Gregorian days.
‡ Equivalent to 365.2425 Gregorian days.

Year 2038 problem and the Epochalypse

Most legacy systems use 32-bits to represent unixtime which will become a problem at 03:14:07 on Tuesday, 19 January 2038 when this number representation will exceed its limited range (0 to 2^32=4294967296).

Before reaching this limit date it expected that most systems will have updated to a 64-bits representation or been decommissioned.