String date = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new java.util.Date(Unix timestamp * 1000))

 var unixTimestamp = new Date(Unix timestamp * 1000)
commonTime = unixTimestamp.toLocaleString()

DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
long lTime = long.Parse(timeStamp + "0000000");
TimeSpan toNow = new TimeSpan(lTime); return dtStart.Add(toNow);  

from_unixtime(Unix timestamp)

date('Y-m-d H:i:s', Unix timestamp)

my $time = Unix timestamp
my ($sec, $min, $hour, $day, $month, $year) = (localtime($time))[0,1,2,3,4,5,6]

SELECT TIMESTAMP WITH TIME ZONE 'epoch' + Unix timestamp) * INTERVAL '1 second';

import time
time.gmtime(Unix timestamp)

Time.at(Unix timestamp)

DATEADD(s, Unix timestamp, '1970-01-01 00:00:00')

date -d @Unix timestamp

long epoch = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").parse("01/01/1970 01:00:00");

var commonTime = new Date(Date.UTC(year, month - 1, day, hour, minute, second))

DateTime DateStart= new DateTime(1970,1,1,8,0,0);
return Convert.ToInt32((DateTime.Now - DateStart).TotalSeconds);

SELECT unix_timestamp(time)
时间格式: YYYY-MM-DD HH:MM:SS 或 YYMMDD 或 YYYYMMDD

mktime(hour, minute, second, month, day, year)

use Time::Local
my $time = timelocal($sec, $min, $hour, $day, $month, $year);

SELECT extract(epoch FROM now())

import time
int(time.mktime(time.strptime('YYYY-MM-DD HH:MM:SS', '%Y-%m-%d %H:%M:%S')))

Time.local(year, month, day, hour, minute, second)

SELECT DATEDIFF(s, '1970-01-01 00:00:00', time)

date +%s -d"Jan 1, 1970 00:00:01"