"Tue, 13 Jan 1970 15:05:50"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
15:05:50
General datetime
1970-01-13 15:05:50Z
For Database
1970-01-13 15:05:50
For HTTP1.1
Tue, 13 Jan 1970 15:05:50 GMT