The Spring Thanksgiving Festival is an annual event in Harvest Moon: Back to Nature. It is held on 14th of Spring, between 6:00 am and 5:00 pm.
The Spring Thanksgiving Festival is a day "to give cookies to girls to show your appreciation." Similarly, in Winter, girls give chocolates to boys during the Winter Thanksgiving Festival. Cookies can be player-made through Cooking. It should be noted that Cookies purchased at the Inn cannot be used for this festival as they are automatically consumed upon purchase.