"Wed, 07 Jan 1970 18:16:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
18:16:36
General datetime
1970-01-07 18:16:36Z
For Database
1970-01-07 18:16:36
For HTTP1.1
Wed, 07 Jan 1970 18:16:36 GMT