"Mon, 19 Jan 1970 14:12:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
14:12:12
General datetime
1970-01-19 14:12:12Z
For Database
1970-01-19 14:12:12
For HTTP1.1
Mon, 19 Jan 1970 14:12:12 GMT