1 year is a Paper anniversary
2 years is a Cotton anniversary
3 years is a Leather anniversary
4 years is a Linen anniversary
5 years is a Wood anniversary
6 years is an Iron anniversary
7 years is a Wool anniversary
8 years is a Bronze anniversary
9 years is a Copper anniversary
10 years is a Tin (or Aluminum) anniversary
11 years is a Steel anniversary
12 years is a Silk anniversary
13 years is a Lace anniversary
14 years is an Ivory anniversary
15 years is a Crystal anniversary
17 years is a Turquoise anniversary
20 years is a China (porcelain) anniversary
25 years is a Silver Jubilee
30 years is a Pearl anniversary
35 years is a Coral (or jade) anniversary
40 years is a Ruby anniversary
45 years is a Sapphire anniversary
50 years is a Gold Jubilee
55 years is an Emerald anniversary
60 years is a Diamond Jubilee
65 years is a Blue Sapphire anniversary
70 years is a Platinum Jubilee.
75 years is a Diamond anniversary
80 years is an Oak anniversary