Below is a table indicating how to obtain a Unix Epoch Timestamp from various programming languages:

Language Command
Actionscript 
(new Date()).time
ASP 
DateDiff("s", "01/01/1970 00:00:00", Now())
C++ 
#include <ctime>
std::time(0);
C# 
epoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000;
Erlang 
calendar:datetime_to_gregorian_seconds(
calendar:now_to_universal_time( now())
)-719528*24*3600
Java 
long epoch = System.currentTimeMillis()/1000;
JavaScript 
Math.round(new Date().getTime()/1000.0) getTime()
MSSQL 
SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())
MySQL 
SELECT unix_timestamp(now())
*Nix Shell 
date +%s
Oracle 
SELECT (SYSDATE - TO_DATE('01-01-1970 00:00:00', 
'DD-MM-YYYY HH24:MI:SS')) * 24 * 60 * 60 FROM DUAL
Perl 
time
PHP 
time()
PostgreSQL 
SELECT extract(epoch FROM now());
PowerShell 
Get-Date -UFormat "%s"
Python 
import time
time.time()
Ruby 
Time.now.to_i
VBScript 
DateDiff("s", "01/01/1970 00:00:00", Now())
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