In Sheet1!A1 put the date of the first day you want. In A1 of each other sheet you could have
Formula:
=Sheet1!A1-1+VALUE(LEFT(RIGHT(CELL("filename"),LEN(CELL("filename"))-FIND("]",CELL("filename"))),2))
The RIGHT(CELL("filename"),LEN(CELL("filename"))-FIND("]",CELL("filename"))) part gets the filename of the cell, including tab name, in this format example: C:\Users\nzwstation21\AppData\Roaming\Microsoft\Excel\XLSTART\[PERSONAL.XLSB]Sheet1 It then takes everything to the right of the ], ie the tab name. Given you have named your tabs 01. 02. 03. etc, you need the left 2 characters and then convert it to a value. So for sheet 2 it takes the date in A1, subtracts 1 and adds 1, being a net gain of 1.
Then select all the sheets and change the format of cell A1 to Dddd D"th" Mmmm YYYY
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