"Wed, 28 Jan 1970 18:13:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700128
Only TIME
18:13:13
General datetime
1970-01-28 18:13:13Z
For Database
1970-01-28 18:13:13
For HTTP1.1
Wed, 28 Jan 1970 18:13:13 GMT