"Thu, 01 Jan 1970 11:02:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
11:02:42
General datetime
1970-01-01 11:02:42Z
For Database
1970-01-01 11:02:42
For HTTP1.1
Thu, 01 Jan 1970 11:02:42 GMT