"Thu, 12 Feb 1970 04:42:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
04:42:35
General datetime
1970-02-12 04:42:35Z
For Database
1970-02-12 04:42:35
For HTTP1.1
Thu, 12 Feb 1970 04:42:35 GMT