"Tue, 27 Jan 1970 12:33:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
12:33:47
General datetime
1970-01-27 12:33:47Z
For Database
1970-01-27 12:33:47
For HTTP1.1
Tue, 27 Jan 1970 12:33:47 GMT