"Both are a great place to begin for those new to the teachings. The primary difference is the length of the activity. A public talk will be contained, with a reserved seat, and last about 2-3 hours. The Day of Mindfulness is all day and you really have the opportunity to experience many different elements of the practice (eating and total relaxation are two you won't get at the public talk). Both are appropriate for beginners." - Kenley Neufeld