"Thu, 12 Feb 1970 23:32:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
23:32:38
General datetime
1970-02-12 23:32:38Z
For Database
1970-02-12 23:32:38
For HTTP1.1
Thu, 12 Feb 1970 23:32:38 GMT