"Fri, 16 Jan 1970 20:42:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
20:42:16
General datetime
1970-01-16 20:42:16Z
For Database
1970-01-16 20:42:16
For HTTP1.1
Fri, 16 Jan 1970 20:42:16 GMT