"Fri, 23 Jan 1970 23:38:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700123
Only TIME
23:38:12
General datetime
1970-01-23 23:38:12Z
For Database
1970-01-23 23:38:12
For HTTP1.1
Fri, 23 Jan 1970 23:38:12 GMT