have had 2 parties - The party of the Century and The party of the Millennium. What's next?! Please see below:?!
Of the Galaxy... a Galactic Party, to end all parties!
The Party of the Third Decade? The Party of the Pearl (Pearl being the symbol for 30 years married. I know it isn't that, but still!).
Party of the decade 111 (roman numerals)
party of the thirtieth decade