I want to maximize bang for my charitable bucks; good stewardship demands it (here's one way, for example). Should I, therefore, participate in Christmas toy drives or other holiday giving opportunities? Or should I instead spread my giving more evenly over the calendar? At the margin, how does another dollar given at Christmas compare to a dollar given in August? Does the production function for peace on earth and good will to men exhibit increasing or decreasing marginal returns? Is it nice and smooth, or is it more complex?