The graduation ceremony is due to start in the midmorning, according to fact-checking website PolitiFact. While it is unclear exactly how long it will last Trump, 77, who owns a private jet, may well be able to make it to the dinner and attend both events.
I don't know which "private school in Florida" Barron attends, or precisely what "midmorning" is in this context, but I know that graduation ceremonies can easily go on all day long. If Trump fails to appear at Barron's graduation, he is clearly and willfully abusing the generosity of the court, and should expect no such further generosity.
Hell, even if he does appear at the graduation, the fact that he was relieved of having to appear in court in New York has made it so that he can appear at this fundraiser in Minnesota.