"Wed, 07 Jan 1970 14:52:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
14:52:56
General datetime
1970-01-07 14:52:56Z
For Database
1970-01-07 14:52:56
For HTTP1.1
Wed, 07 Jan 1970 14:52:56 GMT