In your dog house.
In your horse's stable (water tank).
Exchange 1,000 medals at the horse races.
Buy one from Won for 50,000 G.
Check a lamppost between the Church and the Town Square.
Mary's library, second floor, farthest one to the right.
New Year's game show on the TV inside your Town Cottage.
Calendar in your Mountain Cottage.
Take 8 of them to Thomas' house and check the refrigerator.