Active Date to Inactive Date

I've been hestitating to make this determination, but I think now I can. Here it is, and hopefully I will remember it in the future:

The Event Calendar shows "Active Date" to "Inactive Date."

In other words, when it says an event will run from, say, the 11th to the 16th, then that means the last day is the 15th and not the 16th. If I wake up and log on on the 16th then the event will be closed. Over.