The cap-and-gown moment doesn't have to come with a financial hangover. A graduation party is one of those expenses that looks small in pieces — venue, food, drinks, photos — until you add it up and it lands somewhere around $3,200. The trick is treating it like a project with a deadline, not a surprise.
Lock the venue 3 to 4 months out, then back-budget everything else from that date. That runway gives you space to put the whole bill on one purchase and spread the payoff over roughly 15 months at about $213 a month, with no interest if you clear it in the window.
The 0% intro APR for 15 months on purchases is a deadline, not a discount — there's no interest charged during the window as long as you make minimum payments on time, but any balance left after month 15 starts accruing it at the card's regular APR. So the plan only works if $213 a month actually clears the balance by the end of month 15. Miss that, and the leftover suddenly costs you money instead of time.