"Mon, 05 Jan 1970 00:38:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
00:38:00
General datetime
1970-01-05 00:38:00Z
For Database
1970-01-05 00:38:00
For HTTP1.1
Mon, 05 Jan 1970 00:38:00 GMT