The Week Containing selection criteria can be used to narrow down the time frame for which details will be included in the report output. In this version of the Date control, you have the option of specifying:
Custom Date -- You can specify a single date by either typing in the date directly or using the calendar control. Specifying this date will result in all plan or assignment details as of the week containing that date to be included in the report output.
Named Date -- You can specify a named date from the list of available built-in values. When using a named date on this report, the end date of that named date will be considering when determining which week to display. 
Note that if you have enabled the Allow Creation of and Show Fiscal Calendar Options (unanet.fiscal_calendar.enabled) property, additional 'fiscal' period options will be available in the drop-down.
Fiscal periods must be established via the Admin >> Setup >> Fiscal Year screen in order to be available for use in reporting. Specific Fiscal Periods appearing in drop-down lists will be a concatenation of Fiscal Year Name w/ Accounting Period.
