The SDG has the capability to simulate the passage of time through a given school year via the concept of data periods. At the most basic level, a data period is simply a period of time for which the SDG will generate and output data. Mutators, when present, run at the end of each data period.
Date period Name elements will be used when crafting output file names so that data can easily be grouped by time period for bulk loading. The most frequent use case is data periods which neatly align with school calendar periods such as grading periods, terms, or school years.