A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
For row 2:
=MAX(B2:AZ2) will return the largest date in the row (first instance if repeated)
=MATCH(MAX(B2:AZ2),A2:AZ2,0) would return the column number where that date was found
combine those into an ADDRESS() function and this formula
=ADDRESS(ROW(),MATCH(MAX(B2:AZ2),A2:AZ2,0))
will return the address of the (first) cell containing the greatest date on the row.
Take that last formula and fill down to get the information for each row.