Changing text YYYYMMDD to date field MM-DD-YYYY

I suggest you create a formula date field with this formula.   For ease of reading I make use of Formula Variables. 

var text YYYYMMDD = [insert your imported field here];
var number YYYY = ToNumber(Left($YYYYMMDD, 4));
var number MM   =  ToNumber(Mid($YYYYMMDD, 5,2));
var number DD     = ToNumber(Right($YYYYMMDD,2));

Date($YYYY,$MM,$DD)


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