The report documents work to modify version 3 of the Sydney Strategic Model (STM3) to work with an average school day definition, rather than an average workday. The work was undertaken in late 2013. The change was made by modifying the travel frequency models to work with an average school day definition. No changes were made to the mode-destination models on the basis that the factors that impact upon mode and destination choice are not expected to vary significantly in and out of school term time. The report presents analysis comparing the tour frequency rates between workdays and school days, and then goes on to present a comparison of the frequency model parameters estimated using the school day definition to the previous parameters estimated using the workday definition.