"Fri, 30 Jan 1970 21:42:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700130
Only TIME
21:42:23
General datetime
1970-01-30 21:42:23Z
For Database
1970-01-30 21:42:23
For HTTP1.1
Fri, 30 Jan 1970 21:42:23 GMT