"Mon, 05 Jan 1970 18:15:26"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
18:15:26
General datetime
1970-01-05 18:15:26Z
For Database
1970-01-05 18:15:26
For HTTP1.1
Mon, 05 Jan 1970 18:15:26 GMT