"Mon, 05 Jan 1970 11:08:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
11:08:20
General datetime
1970-01-05 11:08:20Z
For Database
1970-01-05 11:08:20
For HTTP1.1
Mon, 05 Jan 1970 11:08:20 GMT