"Mon, 05 Jan 1970 00:19:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
00:19:23
General datetime
1970-01-05 00:19:23Z
For Database
1970-01-05 00:19:23
For HTTP1.1
Mon, 05 Jan 1970 00:19:23 GMT