How to get the current epoch time

 How to get the current epoch time in ...

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Perl	time
PHP	time()
Ruby	Time.now (or Time.new ). To display the epoch: Time.now.to_i
Python	import time first, then time.time()
Java	long epoch = System.currentTimeMillis()/1000;
Microsoft .NET C#	epoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000;
VBScript/ASP	DateDiff("s", "01/01/1970 00:00:00", Now())
Erlang	calendar:datetime_to_gregorian_seconds(calendar:now_to_universal_time( now()))-719528*24*3600.
MySQL	SELECT unix_timestamp(now())
PostgreSQL	SELECT extract(epoch FROM now());
Oracle PL/SQL	SELECT (SYSDATE - TO_DATE('01-01-1970 00:00:00', 'DD-MM-YYYY HH24:MI:SS')) * 24 * 60 * 60 FROM DUAL
SQL Server	SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())
JavaScript	Math.round(new Date().getTime()/1000.0) getTime() returns time in milliseconds.
Unix/Linux	date +%s
Other OS's	Command line: perl -e "print time" (If Perl is installed on your system)

 Convert from human readable date to epoch

Perl	Use these Perl Epoch routines
PHP	mktime(hour , minute , second , month , day , year )
Ruby	Time.local(year , month , day , hour , minute , second , usec ) (or Time.gm for GMT/UTC input). To display add .to_i
Python	import time first, then int(time.mktime(time.strptime('2000-01-01 12:34:00', '%Y-%m-%d %H:%M:%S'))) - time.timezone
Java	long epoch = new java.text.SimpleDateFormat ("dd/MM/yyyy HH:mm:ss").parse("01/01/1970 01:00:00");
VBScript/ASP	DateDiff("s", "01/01/1970 00:00:00", time field )
MySQL	SELECT unix_timestamp(time ) Time format: YYYY-MM-DD HH:MM:SS or YYMMDD or YYYYMMDD More on using Epoch timestamps with MySQL
PostgreSQL	SELECT extract(epoch FROM date('2000-01-01 12:34')); With timestamp: SELECT EXTRACT(EPOCH FROM TIMESTAMP WITH TIME ZONE '2001-02-16 20:38:40-08'); With interval: SELECT EXTRACT(EPOCH FROM INTERVAL '5 days 3 hours');
SQL Server	SELECT DATEDIFF(s, '1970-01-01 00:00:00', time field )
JavaScript	use the JavaScript Date object
Unix/Linux	date +%s -d"Jan 1, 1980 00:00:01" Replace '-d' with '-ud' to input in GMT/UTC time.

 Convert from epoch to human readable date

Perl	Use these Perl Epoch routines
PHP	date(output format , epoch ); Output format example: 'r' = RFC 2822 date
Ruby	Time.at(epoch )
Python	import time first, then time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.localtime(epoch )) Replace time.localtime with time.gmtime for GMT time.
Java	String date = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new java.util.Date (epoch *1000));
VBScript/ASP	DateAdd("s", epoch , "01/01/1970 00:00:00")
PostgreSQL	PostgreSQL version 8.1 and higher: SELECT to_timestamp(epoch ); Older versions: SELECT TIMESTAMP WITH TIME ZONE 'epoch' + epoch * INTERVAL '1 second';
MySQL	from_unixtime(epoch , optional output format ) The default output format is YYY-MM-DD HH:MM:SS more ...
SQL Server	DATEADD(s, epoch , '1970-01-01 00:00:00')
Microsoft Excel	=(A1 / 86400) + 25569 Format the result cell for date/time, the result will be in GMT time (A1 is the cell with the epoch number). For other timezones: =((A1 +/- timezone adjustment) / 86400) + 25569.
JavaScript	use the JavaScript Date object
Unix/Linux	date -d @1190000000 Replace 1190000000 with your epoch, needs recent version of 'date'. Replace '-d' with '-ud' for GMT/UTC time.
Other OS's	Command line: perl -e "print scalar(localtime(epoch ))" (If Perl is installed) Replace 'localtime' with 'gmtime' for GMT/UTC time.