As I understand it they are given on the anniversary of the girl joining the movement. On Go there is a list of when each one is due. A note in the programme book would make it possible to give them out on nearest date for the anniversary. I intend ordering before the start of each term those need during the term so I can do this. Your alternative of giving them out at the end of term is also a possibility. Could do it at a parents' event as well. You can't give them out before they are due.