"Wed, 28 Jan 1970 14:12:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700128
Only TIME
14:12:23
General datetime
1970-01-28 14:12:23Z
For Database
1970-01-28 14:12:23
For HTTP1.1
Wed, 28 Jan 1970 14:12:23 GMT