Working_day__c false IF(text(month(Evaluation_date__c)) = "4",21, IF(text(month(Evaluation_date__c)) = "5",20, IF(text(month(Evaluation_date__c)) = "6",20, IF(text(month(Evaluation_date__c)) = "7",23, IF(text(month(Evaluation_date__c)) = "8",21, IF(text(month(Evaluation_date__c)) = "9",22, IF(text(month(Evaluation_date__c)) = "10",17, IF(text(month(Evaluation_date__c)) = "11",21, IF(text(month(Evaluation_date__c)) = "12",22, IF(text(month(Evaluation_date__c)) = "1",20, IF(text(month(Evaluation_date__c)) = "2",16, IF(text(month(Evaluation_date__c)) = "3",23,0) ) ) ) ) ) ) ) ) ) )) BlankAsZero 18 false 0 false Number false