You can find out what year a Beanie Baby was introduced by doing the following:

1. Look for the swing tag on the Beanie Baby which displays the name of the toy and the year it was made.
2. If the swing tag is not available, you can search for the name of the Beanie Baby on the internet and find out the year it was first introduced. There are several websites that provide a list of Beanie Babies and the years in which they were produced.
3. You can also use a Beanie Baby collector's guide to find the year of production. These guides provide detailed information on all the different types of Beanie Babies, including their names, release years, and special features.