To find the dates for minimums and maximums in Excel, you will need to use the MIN and MAX formulas. These formulas will return the minimum and maximum values from a range of cells, respectively. You can use these formulas to find the dates for minimums and maximums in Excel by using the following steps:

1. Select the cell in which you want the minimum or maximum date to appear. This can be any cell in your worksheet.
2. Enter the MIN or MAX formula into the selected cell. Be sure to include the range of cells that you want to consider when finding the minimum or maximum value. For example, if you want to find the minimum value from cells A1 through A10, you would enter the following formula into the selected cell:

   =MIN(A1:A10)

3. Press Enter to see the result. The selected cell will now contain the date corresponding to the minimum or maximum value from the specified range.

Note: If there are multiple cells with the same minimum or maximum value, only one of those cells will be returned by the MIN or MAX formula. The specific cell that is returned is determined by Excel's internal sorting algorithm, which is generally based on cell address (i.e., which cell appears first when sorted left-to-right and top-to-bottom).