On the Reminders page, when you are looking at wedding anniversaries, the message is: "9th Wedding Anniversary for x and y",
when in fact it should say 10th Wedding anniversary. The message is telling you how many years they have been married, not what the upcoming anniversary is going to be. This is not consistent with the way birthday reminders work, where the message is telling you how old the client is going to be on the upcoming date. This used to work, but at some point in the last few months it has changed.

To be clear, you may want to change the verbiage to "50th Wedding Anniversary is on mm/dd/yy.