"Wed, 07 Jan 1970 23:33:07"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
23:33:07
General datetime
1970-01-07 23:33:07Z
For Database
1970-01-07 23:33:07
For HTTP1.1
Wed, 07 Jan 1970 23:33:07 GMT