"Mon, 05 Jan 1970 23:35:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
23:35:36
General datetime
1970-01-05 23:35:36Z
For Database
1970-01-05 23:35:36
For HTTP1.1
Mon, 05 Jan 1970 23:35:36 GMT