Counting Date/time field changes

Is it possible to create a formula that will keep a running count of how often a date and time field changes?  I make daily uploads tracking hardware login information and I am attempting to track a fields times its updated.  I found an old formula that will supposedly track a text field change ( I will post bellow) but the text field may not change for some of my users.  In addition this formula does not seem to actually increase in values.

var text value = [Last Login User];

Count(
Part($value,1,"]"),
Part($value,2,"]"),
Part($value,3,"]"),
Part($value,4,"]"),
Part($value,5,"]"),
Part($value,6,"]"),
Part($value,7,"]"),
Part($value,8,"]"),
Part($value,9,"]"),
Part($value,10,"]"),
Part($value,11,"]"),
Part($value,12,"]"),
)