Help in Calculated Columns

Hi,

I have a bunch of columns with dates on them, I wanted to create a column where I can show which column has a date the is about to expire. 

For example.

Column1     ColumnA     ColumnB     ColumnC     ColumnD

Column A    26/5/2022   8/10/2023   7/10/2023    9/10/2022

Column D    31/7/2025   27/4/2024   26/10/2023  17/6/2022

I don't want to show the date on Column1, but the title of the column which has the minimum date among all columns.

thanks