A Cool Way to add Timestamps to Excel #excel . . . Circular references and iterative calculations are supported in Microsoft Excel 2007 and later versions (including Excel 2010, 2013, 2016, 2019, and Excel 365). How It Works Circular Reference: Occurs when a formula refers to its own cell, either directly or indirectly. Iterative Calculation: Excel allows controlled circular references by enabling iterative calculations, which limit the number of recalculations to avoid infinite loops. How to En