Are you limiting your question to the United States style "Thanksgiving"celebrated always on the last Thursday in November? Or, is your question more general and inclusive of traditional "Autumn Harvest" type celebrations, which have been common in many cultures throughout history?
I think thanksgiving is reserved for you turkey-eaters. I don't think there is a significant cultural celebration over here. The agricultural calendar want November to be the month of seeding, but nothing too significant to talk about.