"Wed, 07 Jan 1970 19:39:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
19:39:19
General datetime
1970-01-07 19:39:19Z
For Database
1970-01-07 19:39:19
For HTTP1.1
Wed, 07 Jan 1970 19:39:19 GMT