"Fri, 20 Mar 1970 07:12:28"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700320
Only TIME
07:12:28
General datetime
1970-03-20 07:12:28Z
For Database
1970-03-20 07:12:28
For HTTP1.1
Fri, 20 Mar 1970 07:12:28 GMT