The Date Range setting defines the dates for which a Price Formula is effective. The Formula is effective beginning on the Start Date, through the End Date, and all dates in between.
If the Formula should always be effective, leave both the Start Date and End Date blank (Null). This has the same effect as entering the Date Range of / / to / / which represents January 1, 1985 through an indefinite date in the future.
Price Formulas may be set up ahead of time and become effective only when the Start Date is reached, and become ineffective when the End Date is reached.
Warning: If the Start Date is in the past, the price Formula applies to transactions already saved and is effective when they are edited. It is recommended to avoid using past Starting Dates when entering new Price Formulas.
See:
Price Tables - General Information
Configuration Manager Contents