The current Unix timestamp is: 1484289773
What is a timestamp?
Unix timestamp (Unix timestamp), also known as Unix time (Unix time), POSIX time (POSIX time), is a time representation method, defined as starting from 00:00 Greenwich Mean Time on January 1, 1970 The total number of seconds since minute 00 seconds. Unix timestamps are not only used in Unix systems and Unix-like systems, but are also widely used in many other operating systems. Most Unix systems store the timestamp as a 32-bit integer, which may cause some problems on January 19, 2038 (Y2038 problem).
How to get the current Unix timestamp (Unix timestamp) in different programming languages?
| Java | time |
| JavaScript | Math.round(new Date().getTime()/1000) The unit of the value returned by getTime() is milliseconds |
| Microsoft .NET/C | #epoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000 |
| MySQL | SELECT unix_timestamp(now()) |
| Perl | time |
| PHP | time() |
| PostgreSQL | SELECT extract(epoch FROM now()) |
| Python | First import time Then time.time() |
| Ruby | Get Unix timestamp: Time.now or Time.new Display Unix timestamp: Time.now.to_i |
| SQL Server | SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE()) |
| Unix / Linux | date %s |
| VBScript / ASP | DateDiff("s", "01/01/1970 00:00:00", Now()) |
| Other operating systems (if Perl is installed on the system) |
Command line status: perl -e "print time" |
How to implement Unix timestamp (Unix timestamp) → ordinary time in different programming languages?
| Java | String date = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new java.util.Date(Unix timestamp * 1000)) |
| JavaScript | First var unixTimestamp = new Date(Unix timestamp * 1000) Then commonTime = unixTimestamp.toLocaleString() |
| Linux | date -d @Unix timestamp |
| MySQL | from_unixtime(Unix timestamp) |
| Perl | First my $time = Unix timestamp Then my ($sec, $min, $hour, $day, $month, $year) = (localtime($time))[0,1,2,3,4,5,6] |
| PHP | date('r', Unix timestamp) |
| PostgreSQL | SELECT TIMESTAMP WITH TIME ZONE 'epoch' Unix timestamp) * INTERVAL '1 second'; |
| Python | First import time Then time.gmtime(Unix timestamp) |
| Ruby | Time.at(Unix timestamp) |
| SQL Server | DATEADD(s, Unix timestamp, '1970-01-01 00:00:00') |
| VBScript / ASP | DateAdd("s", Unix timestamp, "01/01/1970 00:00:00") |
| Other operating systems (if Perl is installed on the system) |
Command line status: perl -e "print scalar(localtime(Unix timestamp))" |
How to implement ordinary time → Unix timestamp (Unix timestamp) in different programming languages?
| Java | long epoch = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").parse("01/01/1970 01:00:00"); |
| JavaScript | var commonTime = new Date(Date.UTC(year, month - 1, day, hour, minute, second)) |
| MySQL | SELECT unix_timestamp(time) Time format: YYYY-MM-DD HH:MM:SS or YYMMDD or YYYYMMDD |
| Perl | First use Time::Local Then my $time = timelocal($sec, $min, $hour, $day, $month, $year); |
| PHP | mktime(hour, minute, second, month, day, year) |
| PostgreSQL | SELECT extract(epoch FROM date('YYYY-MM-DD HH:MM:SS')); |
| Python | First import time Then int(time.mktime(time.strptime('YYYY-MM-DD HH:MM:SS', '% Y-%m-%d %H:%M:%S'))) |
| Ruby | Time.local(year, month, day, hour, minute, second) |
| SQL Server | SELECT DATEDIFF(s, '1970-01-01 00:00:00', time) |
| Unix / Linux | date %s -d"Jan 1, 1970 00:00:01" |
| VBScript / ASP | DateDiff("s", "01/01/1970 00:00:00", time) |
