"Wed, 07 Jan 1970 18:15:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
18:15:19
General datetime
1970-01-07 18:15:19Z
For Database
1970-01-07 18:15:19
For HTTP1.1
Wed, 07 Jan 1970 18:15:19 GMT