当前日期时间：，时间戳：
| Go | int32(time.Now().Unix()) |
|---|---|
| Java | System.currentTimeMillis() / 1000 |
| JavaScript | Math.round(new Date().getTime()/1000) |
| 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 | time.time() |
| Ruby | 获取Unix时间戳：Time.now 或 Time.new; 显示Unix时间戳：Time.now.to_i |
| SQL Server | SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE()) |
| Unix / Linux | date +%s |
| Swift | NSDate().timeIntervalSince1970 |
| Objective-C | [[NSDate date] timeIntervalSince1970] |
| Lua | os.time() |
| VBScript / ASP | DateDiff("s", "01/01/1970 00:00:00", Now()) |
| 其他操作系统命令行 | perl -e "print time" |