what is the earliest time people can begin lining up for a 7pm concert?

I walked right in at 7pm.

I got there 2 hrs early, and there was already a good size line.

Earlier the better, to get in quickly without having to hassle with traffic nn the crowds

You can line up as long as the property is open. The actual queue line goes up about 2-3 hours before the show....

I saw them lined up at 4 when I went