diff --git a/models/reporting/general/monthly_aggregated_metrics_history_by_deal_by_time_window.sql b/models/reporting/general/monthly_aggregated_metrics_history_by_deal_by_time_window.sql
index 253280e..cf38baa 100644
--- a/models/reporting/general/monthly_aggregated_metrics_history_by_deal_by_time_window.sql
+++ b/models/reporting/general/monthly_aggregated_metrics_history_by_deal_by_time_window.sql
@@ -6,6 +6,7 @@ with
 
 select
     date as date,
+    date_trunc('month', date)::date as first_day_month,
     id_deal as id_deal,
     time_window as time_window,
     metric_from_date as metric_from_date,
diff --git a/models/reporting/general/monthly_growth_score_by_deal.sql b/models/reporting/general/monthly_growth_score_by_deal.sql
index 73dc0bb..d354319 100644
--- a/models/reporting/general/monthly_growth_score_by_deal.sql
+++ b/models/reporting/general/monthly_growth_score_by_deal.sql
@@ -4,8 +4,8 @@ with
     )
 select
     date as date,
+    date_trunc('month', date)::date as first_day_month,
     id_deal as id_deal,
-
     client_type as client_type,
     main_deal_name as main_deal_name,
     has_active_pms as has_active_pms,
diff --git a/models/reporting/general/schema.yml b/models/reporting/general/schema.yml
index 9836f22..10983fc 100644
--- a/models/reporting/general/schema.yml
+++ b/models/reporting/general/schema.yml
@@ -641,6 +641,13 @@ models:
         data_tests:
           - not_null
 
+      - name: first_day_month
+        data_type: date
+        description: |
+          First day of the month corresponding to the date field.
+        data_tests:
+          - not_null
+
       - name: client_type
         data_type: string
         description: |
@@ -1479,6 +1486,13 @@ models:
         data_tests:
           - not_null
 
+      - name: first_day_month
+        data_type: date
+        description: |
+          First day of the month corresponding to the date field.
+        data_tests:
+          - not_null
+
       - name: id_deal
         data_type: character varying
         description: Id of the deal associated to the host.