"Wed, 07 Jan 1970 14:45:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
14:45:15
General datetime
1970-01-07 14:45:15Z
For Database
1970-01-07 14:45:15
For HTTP1.1
Wed, 07 Jan 1970 14:45:15 GMT