"Thu, 12 Feb 1970 14:28:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
14:28:57
General datetime
1970-02-12 14:28:57Z
For Database
1970-02-12 14:28:57
For HTTP1.1
Thu, 12 Feb 1970 14:28:57 GMT