A 50th anniversary is a massive deal, and holding it at a lodge means you need to lock in that space early. Six months out is the golden window to secure your spot and start your savings plan.
You are looking at about $2000 for the event. By breaking that total into small, monthly chunks starting now, you take the sting out of the final bill.
The 0% intro APR is a tool for spreading out payments, not a discount on the dinner. If you have not paid off the full $2000 by the end of the 15 months, the remaining balance will begin to accrue interest at the standard rate.