"Wed, 28 Jan 1970 14:15:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700128
Only TIME
14:15:18
General datetime
1970-01-28 14:15:18Z
For Database
1970-01-28 14:15:18
For HTTP1.1
Wed, 28 Jan 1970 14:15:18 GMT