The user is required to enter a time window that defines the start and end of the simulation period. The time window requires a starting date and time and an ending date and time. The date must have a four digit year and can be entered in either of the two following formats: 05Jan2000 or 01/05/2000. The time field is entered in military style format (i.e. 1 p.m. is entered as 1300).