"Wed, 07 Jan 1970 05:51:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
05:51:56
General datetime
1970-01-07 05:51:56Z
For Database
1970-01-07 05:51:56
For HTTP1.1
Wed, 07 Jan 1970 05:51:56 GMT