"Tue, 13 Jan 1970 17:11:41"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
17:11:41
General datetime
1970-01-13 17:11:41Z
For Database
1970-01-13 17:11:41
For HTTP1.1
Tue, 13 Jan 1970 17:11:41 GMT