Everyday. However, I work on the bulk of the assignments one week in advance of the games. I start working on assignments on Friday morning for the period of Saturday – Friday of the following week. In other words, each Friday I am working on the game assignments 8-13 days in the future. Completing the assignments takes a long time and entails a lot of work. These bulk assignments are published around noon on Sunday. Other assignments are published during the week whenever they are completed.
Since most assignment work is being done on Friday and Saturday, it is critical that your calendar be up-to-date by Thursday evening for the next assignment period. Trying to block your calendar after the assignor has given you an assignment does not work and you will end up having to turn back assignments. Referees who turn back assignments are quickly dropped from the available referee list.