The reason it is not filled in automatically is date the BSA has for the start of Scouts BSA membership is almost always wrong. The BSA starts all memberships on the first of the month the Scout joins. Since very few Scouts join on the first of the month, it is better to let the unit fill the date in. This becomes even more critical for OA if the Scout camped with the pack immediately before joining the troop since Cub Scout camping does not qualify for OA.