diff --git a/models/marts/_models.yml b/models/marts/_models.yml
index 7d855c6..9c86054 100644
--- a/models/marts/_models.yml
+++ b/models/marts/_models.yml
@@ -2,6 +2,9 @@ models:
   - name: time_spine
     time_spine:
       standard_granularity_column: date_day # column for the standard grain of your table
+      custom_granularities:
+        - name: fiscal_quarter
     columns:
       - name: date_day
-        granularity: day # set granularity at column-level for standard_granularity_column
\ No newline at end of file
+        granularity: day # set granularity at column-level for standard_granularity_column
+      - name: fiscal_quarter
\ No newline at end of file
diff --git a/models/marts/time_spine.sql b/models/marts/time_spine.sql
index cb61284..5381fe5 100644
--- a/models/marts/time_spine.sql
+++ b/models/marts/time_spine.sql
@@ -12,7 +12,8 @@ days as (
 cast_to_date as (
 
     select 
-        cast(date_day as date) as date_day
+        cast(date_day as date) as date_day,
+        date_trunc('quarter', date_day) as fiscal_quarter
     
     from days