My 17th wedding anniversary…anniversary is the date on which an event took place or an institution was founded in a previous year, and may also refer to the commemoration or celebration of that event. Plural Anniversaries…

1: the annual recurrence of a date marking a notable event

* a wedding anniversary; broadly : a date that follows such an event by a specified period of time measured in units other than years, 6-month anniversary of the accident – and of course to celebrate and anniversary.

Anniversary Gifts for Each Year
For each anniversary, there are certain types of gifts to give. Everybody knows that the Silver anniversary is the 25th and the gold anniversary the 50th. But how about all the ones in between because each one matters…
The historic origins of wedding anniversaries date back to the Holy Roman Empire, when husbands crowned their wives with a silver wreath on their twenty-fifth anniversary, and a gold wreath on the fiftieth. Later, principally in the twentieth century, commercialism led to the addition of more anniversaries being represented by a named gift.
In Canada, one can also receive a message from the Governor-General for the 50th anniversary, and every fifth anniversary after that. Let’s do the math on this, if I’m 41 years old, and I’ve been married for 17 years, to be married for 50 years I’d need to be…okay let’s not complete this equation.
The names of some anniversaries provide guidance for appropriate or traditional gifts for the spouses to give each other; if there is a party these can be brought by the guests or influence the theme or decoration. These gifts vary in different countries, but some years have well-established connections now common to most nations: 5th Wood, 10th Tin, 15th Crystal, 20th China, 25th Silver, 30th Pearl, 35th Jade, 40th Ruby, 45th Sapphire, 50th Gold, 60th Diamond, and 70th Platinum. In English speaking countries the first, wooden, gift was cut on the day of celebration and then presented to the wife as a finished article before the next two quarter days had passed. This means the 4 significant dates throughout the year things like school starting, rent being due etc. The modern tradition may have originated in medieval Germany where, if a married couple lived to celebrate the 25th anniversary of their wedding, the wife was presented by her friends and neighbours with a silver wreath to congratulate them for the good fortune that had prolonged the lives of the couple for so many years.
Gemstones and Meanings around the 17th