He hasn't called to confirm our date, should I be concerned?

Anonymous
The guy I recently started talking to, asked if we can hang out. He said he is free whenever I'm free. So, I said Friday. We didn't set the place or the time because I assumed we will do that today (Friday). Its already 3pm and he hasn't called to confirm our date. Should I be concerned? Could it be that he is busy or trying to act cool? Is he going to call me at the last minute and expect me to still be available? Guys do you usually call and confirm if so around what time? could it be that he doesn't respect me?...any thoughts on this, please help
Updates
+1 y
A quy friend told me that I should challenge him because men respond to that is this true?...he wants me to text "hey you..are we still on or did you chicken out"? good or bad move?
He hasn't called to confirm our date, should I be concerned?
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