diff --git a/MISOReports/MISOReports.py b/MISOReports/MISOReports.py
index 2f7dbdd..e2e14d5 100644
--- a/MISOReports/MISOReports.py
+++ b/MISOReports/MISOReports.py
@@ -184,6 +184,8 @@ def add_to_datetime(
             MISOMarketReportsURLBuilder.url_generator_YYYY_mm_dd_last: relativedelta(days=1),
             MISOMarketReportsURLBuilder.url_generator_YYYY_last: relativedelta(years=1),
             MISOMarketReportsURLBuilder.url_generator_no_date: relativedelta(days=0),
+            MISOMarketReportsURLBuilder.url_generator_mmddYYYY_last: relativedelta(days=1),
+            MISOMarketReportsURLBuilder.url_generator_dddYYYY_last_but_as_nth_day_in_year_and_no_underscore: relativedelta(days=1),
         }
 
         if self.url_generator not in increment_mappings.keys():