Three$-$dimensional references, or $3-$D references, allow formulas and functions to use data from cells and cell ranges across worksheets. You will replace the date entered in cell A$4$ of the Mault and Niese worksheets with a $3-$D reference to the Istas worksheet. Then, when a new date is entered on the Istas worksheet, the date will automatically be updated through the ChargesSummarxlinked worksheets as well.

Delete the dates in cell A$4$ on the Mault:ChargesSummarylinked worksheets. Change the dates so the Mault:ChargesSummarxLinked worksheets have a $3-$D reference to cell A$4$ of the Istas, worksheet.