"Tue, 20 Jan 1970 07:53:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700120
Only TIME
07:53:56
General datetime
1970-01-20 07:53:56Z
For Database
1970-01-20 07:53:56
For HTTP1.1
Tue, 20 Jan 1970 07:53:56 GMT