My database table has a timestamp column which will show when a record has been changed. Is it possible to have a timestamp linked to a specific column ?

One of the columns in my table defines whether a record should be displayed at all (i.e. included in any search). I'm looking to record a date when that value has been changed. I'm likely to make that change in phpMyAdmin rather than by using a query (at least initially). I could enter a date in another column manually, but I'm likely to forget.