"Tue, 13 Jan 1970 09:22:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
09:22:23
General datetime
1970-01-13 09:22:23Z
For Database
1970-01-13 09:22:23
For HTTP1.1
Tue, 13 Jan 1970 09:22:23 GMT