Can I feed goldfinch year round?

I just started to feed the goldfinch this summer. Do they stay in Michigan year round?
.
I love the American Goldfinch! The great state of Michigan is lucky enough to have goldfinch year round and if you enjoyed watching them in the summer they'll also bring you joy in the winter. They do lose their bright yellow color but when they sing it's like they bring sunshine with them even on the dreariest days.
.
And for those of you that only feed during the winter and had left over Nyjer seed from last year, it's probably too dried out to feed to your birds this year. One way to check your seed is to pinch it with your fingernails and see if any oil comes out. The finches use their bills to twist the seed and sip the oil and then drop the shell. If your seed has dried out, your feeder will be skipped. (Wild Birds Unlimited receives a fresh load of seed each week).
.
Finally, remember not to cut off the tops of your Marigold, Zinnias, Cosmos, or Coneflowers right now because they're full of tasty seed heads that the Goldfinch love.