"Fri, 30 Jan 1970 20:38:08"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700130
Only TIME
20:38:08
General datetime
1970-01-30 20:38:08Z
For Database
1970-01-30 20:38:08
For HTTP1.1
Fri, 30 Jan 1970 20:38:08 GMT