I can't remember when my kids got their acceptances, but as a tip, if the other things are selective and/or fill up, go ahead and apply. If you wait to hear about the Summer Seminar and find out you didn't get in, you might lose a spot in other opportunities. It's always best to have options, even if you have to eventually say "no" to one or more. Good luck!
I asked my ALO because I was extremely worried about whether or not I've made it in. He said it might be a week or two before we hear anything. Until then, I've just checked my portal everyday multiple times...just in case.