"Wed, 28 Jan 1970 18:03:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700128
Only TIME
18:03:42
General datetime
1970-01-28 18:03:42Z
For Database
1970-01-28 18:03:42
For HTTP1.1
Wed, 28 Jan 1970 18:03:42 GMT