Should arrive around 6PM-7PM.
yes
If those two times are both in the same day, then the period between them is 121/2 hours long.
That will depend on the laws in that jurisdiction. Most places don't have a problem with someone being with a parent. But the law could be different in your area.
About 7.00 a m that same morning. Daylight saving in some Aussie states.
yes
I really don't think that if you have a test the next day you should be smoking...And for that matter you shouldn't do it at all. And the flush thing doesn't always work so my advice don't do it.
Indiana has 2 time zones. Central Time Indiana: Daylight Saving Time: It would be 4:00 PM Standard Time: It would be 3:00 PM Eastern Time Indiana: Daylight Saving Time: It would be 5:00 PM Standard Time: It would be 4:00 PM.