Field help (ITCDAT2) 

Cost calculation date. The default calculation date is today's date but can be changed. The defined date is written to the applicable Products-costs record.

 Only those components in a bill of materials (BOM) valid on this date are included in the calculations.

 This date must fall between the start and end dates of the defined Fiscal year (fields Start (field ITCSTRDAT) and End (field ITCENDDAT)).