Unix (s):1782526524
Unix (ms):1782526524403
ISO 8601:2026-06-27T02:15:24.403Z
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Unix Timestamp Converter

Paste anything
✓ detected: unix timestamp (seconds)

Standard formats

unix timestamp (seconds)
1221436800
unix timestamp (milliseconds)
1221436800000
iso 8601 (utc)
2008-09-15T00:00:00.000Z
iso 8601 (local, no Z)
2008-09-15T00:00:00
rfc 2822 (email/http)
Mon, 15 Sep 2008 00:00:00 +0000
human readable
Monday, 15 September 2008, 00:00:00 UTC

Timezones

UTC
15 Sept 2008, 00:00:00
UTC
15 Sept 2008, 00:00:00
—

Platform-specific formats

windows filetime
128659104000000000
apple cocoa time
243129600
excel serial date
39706.00000
ntp timestamp
3430425600
gps timestamp
Week 1497, ToW 86400s
.net datetime ticks
633570336000000000
webkit timestamp
12865910400000000
tai timestamp
1221436837
(UTC +37s, as of 2017)
julian date
2454724.50000
modified julian date (mjd)
54724.00000
lilian date
155564
unix day
14137

ABOUT THIS TIMESTAMP

Unix timestamp 1221436800 represents Monday, 15 September 2008 at 00:00:00 UTC. In milliseconds it is 1221436800000. This moment falls on day 259 of 2008, in week 37. The ISO 8601 representation is 2008-09-15T00:00:00.000Z. The Windows FILETIME equivalent is 128659104000000000. The Apple Cocoa timestamp is 243129600. The Excel serial date is 39706.00000. The NTP timestamp is 3430425600. The Modified Julian Date is 54724.00000. The Unix Day number is 14137.

DAY OF WEEK
Monday
DAY OF YEAR
259 of 366
WEEK NUMBER
Week 37
UNIX DAY
14137
LEAP YEAR
Yes
DAYS FROM TODAY
6494 days ago
UTC OFFSET FROM NOW
-6494 days

Specialist tools

ABOUT TIMESTAMP CONVERSION

What is a Unix timestamp?

A Unix timestamp is the number of seconds elapsed since 1 January 1970 00:00:00 UTC -- a moment known as the Unix epoch. It is the most universal way computers store and transmit time because it is a timezone-agnostic integer that requires no calendar logic to compare or sort. Most programming languages, databases, and APIs use Unix timestamps as their internal time representation.

Why are there so many timestamp formats?

Different systems chose different starting points and different units. Windows measures time in 100-nanosecond intervals since 1 January 1601. Apple's frameworks count seconds since 1 January 2001. GPS counts weeks and seconds since 6 January 1980. Excel counts days since 30 December 1899, with an intentional bug that treats 1900 as a leap year for Lotus 1-2-3 compatibility. Converting between these formats requires knowing the offset between each epoch and the Unix epoch, then accounting for differences in unit scale.

What can unixtime.wtf convert?

Paste any timestamp and get instant conversion to 17 formats: Unix seconds, Unix milliseconds, ISO 8601, RFC 2822, human readable, Windows FILETIME, Apple Cocoa time, Excel serial date, NTP timestamp, GPS timestamp, .NET DateTime ticks, WebKit timestamp, TAI, Julian Day Number, Modified Julian Date, Lilian Date, and Unix Day. The specialist tools handle JWT token decoding, cron expression parsing, relative time expressions, and batch log normalisation. All conversions happen client-side -- nothing is sent to a server.