Can I substitute a conditional parameter in every formula on page

[Paulyfudd]

I would like to have a series of worksheets where each recognizes a specific,
unique conditional parameter in part of a formula, without having to change
each pages' individual cells' formulas

 

[Gary''s Student]

Allocate a cell, say A1, on each sheet to hold the parameter. The formulas
can be the same, but each sheet can hold a different value in A1

 

[Paulyfudd]

Thanks

I got it linked to a time stamp formula on a protected page, now

Cheers