"Fri, 16 Jan 1970 18:12:27"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
18:12:27
General datetime
1970-01-16 18:12:27Z
For Database
1970-01-16 18:12:27
For HTTP1.1
Fri, 16 Jan 1970 18:12:27 GMT