We have meetings that recognize monthly and yearly anniversaries during the half-way point in a meeting (we take a break, make announcements). Some meetings give a chip for every month of the first year, 1 year, 18 months and every year after that, and the most important chip, 29 days or less--the 24 hour chip). Others recognize 29 days or less (again, the 24 hour chip), 1, 3, 6, 9 months, 1 year, 18 months, and every year after that.