"Tue, 20 Jan 1970 11:05:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700120
Only TIME
11:05:57
General datetime
1970-01-20 11:05:57Z
For Database
1970-01-20 11:05:57
For HTTP1.1
Tue, 20 Jan 1970 11:05:57 GMT