"Tue, 13 Jan 1970 15:08:01"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
15:08:01
General datetime
1970-01-13 15:08:01Z
For Database
1970-01-13 15:08:01
For HTTP1.1
Tue, 13 Jan 1970 15:08:01 GMT