"Fri, 16 Jan 1970 18:03:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
18:03:36
General datetime
1970-01-16 18:03:36Z
For Database
1970-01-16 18:03:36
For HTTP1.1
Fri, 16 Jan 1970 18:03:36 GMT