"Tue, 27 Jan 1970 12:31:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
12:31:35
General datetime
1970-01-27 12:31:35Z
For Database
1970-01-27 12:31:35
For HTTP1.1
Tue, 27 Jan 1970 12:31:35 GMT