also: サファイヤこんしき
noun
sapphire wedding anniversary; 45th wedding anniversary
Refers specifically to the 45th wedding anniversary, following Western anniversary naming conventions adopted in Japan.
両親は今年、サファイア婚式を迎えます。
My parents will celebrate their sapphire wedding anniversary this year.
From English 'sapphire' (サファイア) and 婚式 (wedding ceremony/anniversary), following the Western tradition of naming wedding anniversaries after gemstones or materials.