If you don’t want to stress until the last moment, then it may be better to think about postponing. I’m sure you’ve already booked some services and most certainly a venue, so If you cancel the date you are going to loose loads of money. Most of the suppliers will grant you the same prices unless the new location requires lots of changes. They’ll be more than happy to have the date booked for next year too without loosing your service. If you have an Italian wedding planner, she’ll take care of booking all the services with the new date and send you all updated contracts. Up to two changes are normally included in your contract: if it’s the third time…..well, she will probably ask for a small fee for the extra work, but I’m sure you can negotiate.