Typically the district sets a February 1st deadline for guaranteed services. In past years, this deadline has been closely monitored, and changed for a number of reasons including high workload due to overwhelming conversion requests, material delays and major storm events.
If you are thinking about requesting a service to be added next season, be watchful of the deadlines and change that may occur and consider submitting your application as soon as possible. Watch this website for updates about application deadlines.