Spumante - how long does it last

Hi,
Sorry I’m a complete novice with wine so bare with me.
I’m getting married next year and saw a good offer on Piccini 1881 to use for a toast. Reviews of it are good so I’ve invested in 30 bottles, but then realised that it might not keep that well (until July 2017). Can anyone give me any guidance on whether it will last and best way of storing?
Many thanks

Piccini 1882 is 75% Glera 25% Chardonnay (to save others from looking). You’re probably pushing the window, but the deed is done, so now the best thing you can do is keep them away from heat, light and vibration, and hope for the best. I’d open one six weeks before the big day and see if it held up. I suspect it will work for your purposes.

Congratulations.

Thanks, fingers crossed!!