Hi Everyone,

I have wriiten below trigger to add weekdates to custom object. However I am getting the below error while executing the code. Can anyone help me out to resolve this issue.

trigger AddWeekends on Calendar__c (after insert) {
            List<Calendar__c> lstcal = new List<Calendar__c>();
            List<Calendar__c> lstcal1 = new List<Calendar__c>();
            Date orig = Date.today();
            system.debug('++++'+orig);
            Date satDate = Date.Parse('01/01/2011');
            Date sunDate = Date.Parse('01/02/2011');
            integer i;
           // Adding all Saturdays

            For(i=0; i<52; i++){
            Calendar__c cal = new Calendar__c();
            cal.Date__c = SatDate;
            cal.Holidays__c = 1;
            Cal.Description__c = 'Weekend';
            system.debug('#####'+SatDate);
            upsert Cal;
            satDate += 7;
        }

          // Adding all Sundays
            For(i=0; i<52; i++){
            Calendar__c cal1 = new Calendar__c();
            cal1.Date__c = SunDate;
            cal1.Holidays__c =2;
            Cal1.Description__c = 'Weekend';
            system.debug('$$$$$'+SunDate);
            upsert Cal1;
            sunDate += 7;
        }                   
}

Error Message:  Apex trigger AddWeekends caused an unexpected exception, contact your administrator: AddWeekends: execution of AfterInsert caused by: System.DmlException: Upsert failed. First exception on row 0; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, AddWeekends: maximum trigger depth exceeded Calendar trigger event AfterInsert for [a0O50000002GU5Q] Calendar trigger event AfterInsert for [a0O50000002GU5R] Calendar trigger event AfterInsert for [a0O50000002GU5S] Calendar trigger event AfterInsert for [a0O50000002GU5T] Calendar trigger event AfterInsert for [a0O50000002GU5U] Calendar trigger event AfterInsert for [a0O50000002GU5V] Calendar trigger event AfterInsert for [a0O50000002GU5W] Calendar trigger event AfterInsert for [a0O50000002GU5X] Calendar trigger event AfterInsert for [a0O50000002GU5Y] Calendar trigger event AfterInsert for [a0O50000002GU5Z] Calendar trigger event AfterInsert for [a0O50000002GU5a] Calendar trigger event AfterInsert for [a0O50000002GU5b] Calendar trigger event AfterInsert for [a0O50000002GU5c] Calendar trigger event AfterInsert for [a0O50000002GU5d] Calendar trigger event AfterInsert for [a0O50000002GU5e] Calendar trigger event AfterInsert for [a0O50000002GU5f]: []: Trigger.AddWeekends: line 15, column 13

Any help is appreciated...