"Wed, 07 Jan 1970 14:35:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
14:35:12
General datetime
1970-01-07 14:35:12Z
For Database
1970-01-07 14:35:12
For HTTP1.1
Wed, 07 Jan 1970 14:35:12 GMT