Can I buy tickets For a logic concert held on October 12 in person by going to the stadium? For example are they selling them any day of the week or only that day when it’s held?

Ditto

Yes. The Hollywood Bowl Box Office hours are Tuesday to Sunday: 12PM to 6PM.

I wouldn't suggest it because what if they are sold out. Then you would end up paying for gas to get there, parking and to find out it is sold out...that would be a triple no no. Better to know for sure u have the seats 😃 to enjoy. BTW if it's a late night concert it gets really really breezy, so bring a blanket. Hope this helps you with your decision