Unix timestamp

1639958400

Mon 20 Dec 2021 12:00:00 AM UTC

Coordinated Universal Time

Mon Dec 20 00:00:00 2021 UTC

In your local timezone

2021-12-20T00:00:00+00:00

ISO 8601

Mon, 20 Dec 2021 00:00:00 +0000

RFC 2822

2459569

Julian Date

16 Tevet 5782

Hebrew Date

041

Swatch Internet Time

353

Day of the year

December

Month

31

Days in month

51

Week

Monday

Day of the week

Time Converter


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1639958400

Converting Unix timestamp 1639958400 using our Time Converter gives us the following information:

1639958400 is representing the 353 day of the year 2021 in the Gregorian calendar, having 365 days. There are 12 days left of the year and this particular timestamp falls on a Monday, December 20 of week 51 at 00:00 UTC in the monrning meaning that about 0% of the day has passed. At this specifc time, the moon was in its Full moon phase, about 251,115 miles (or 404,130 km) from Earth.

On this day, many notable and historically important events have taken place. But to only mention a few, in year 69, Antonius Primus enters Rome to claim the title of Emperor for Nero's former general Vespasian. And later in 1192 Richard I of England is captured and imprisoned by Leopold V of Austria on his way home to England after the Third Crusade. More recently, in 2019 the United States Space Force becomes the first new branch of the United States Armed Forces since 1947.

We've also, tragically, seen a few famous deaths throughout history on this day. One notable mention is in 217 when Zephyrinus, pope of the Catholic Church passed away and in 910 when Alfonso III, king of Asturias left us. And more recently, Ezra Vogel, American sociologist (born in 1930) who died in in 2020.

December 20, or 1639958400, is also a day that we should celebrate. This date marks the birth of many influential people throughout history, including Oronce Finé, French mathematician and cartographer (died in 1555) who was born in 1494, and later in 1496 - Joseph ha-Kohen, historian and physician (died in 1575). More recently, Ksenia Makarova, Russian-American figure skater who was born in 1992.

Conversion help

For your conveniance, we have listed the conversion syntaxes for 1639958400 timestamp to serveral of the most popular programming lanugages below.

PHP
date('Y-m-d H:i:s', 1639958400);
MySQL
select from_unixtime(1639958400);
JavaScript
new Date(1639958400*1000).toString();
C++
time_t epch = 1639958400;
printf("%i -> %s", epch, asctime(gmtime(&epch))); (time.h);
C#
String.Format("{0:d/M/yyyy HH:mm:ss}", new System.DateTime(1970, 1, 1, 0, 0, 0, 0).AddSeconds(1639958400));
Java
new SimpleDateFormat("MM/dd/yyyy HH:mm:ss").format(new Date(1639958400 * 1000L))
Ruby
require 'date'
DateTime.strptime("1639958400",'%s')
Binary
11000011 01111111 10001111 0000000
Hexadecimal
61bfc780

A few related timestamps to 1639958400 are:

Start of year
1609459200
End of Year
1640995199
Start of month
1638316800
End of month
1640995199
Start of day
1639958400
End fo day
1640044799
Start of hour
1639958400
End fo hour
1639961999
Start of min
1639958400
End fo min
1639958459