diff --git a/metricflow-semantics/metricflow_semantics/time/time_constants.py b/metricflow-semantics/metricflow_semantics/time/time_constants.py
index 3c66216a1d..6cf0e2358e 100644
--- a/metricflow-semantics/metricflow_semantics/time/time_constants.py
+++ b/metricflow-semantics/metricflow_semantics/time/time_constants.py
@@ -5,11 +5,3 @@
 # Python formatting string to use for converting datetime to ISO8601
 ISO8601_PYTHON_FORMAT = "%Y-%m-%d"
 ISO8601_PYTHON_TS_FORMAT = "%Y-%m-%d %H:%M:%S"
-
-SUPPORTED_GRANULARITIES = [
-    TimeGranularity.DAY,
-    TimeGranularity.WEEK,
-    TimeGranularity.MONTH,
-    TimeGranularity.QUARTER,
-    TimeGranularity.YEAR,
-]
diff --git a/metricflow/dataset/convert_semantic_model.py b/metricflow/dataset/convert_semantic_model.py
index 964d0d4b50..f45d2fe102 100644
--- a/metricflow/dataset/convert_semantic_model.py
+++ b/metricflow/dataset/convert_semantic_model.py
@@ -283,7 +283,7 @@ def _convert_time_dimension(
         time_dimension_instances: List[TimeDimensionInstance] = []
         select_columns: List[SqlSelectColumn] = []
 
-        defined_time_granularity = TimeGranularity.DAY
+        defined_time_granularity = DEFAULT_TIME_GRANULARITY
         if dimension.type_params and dimension.type_params.time_granularity:
             defined_time_granularity = dimension.type_params.time_granularity
 
diff --git a/metricflow/plan_conversion/time_spine.py b/metricflow/plan_conversion/time_spine.py
index 38669b4e3e..dc2355cb78 100644
--- a/metricflow/plan_conversion/time_spine.py
+++ b/metricflow/plan_conversion/time_spine.py
@@ -6,7 +6,7 @@
 from dbt_semantic_interfaces.protocols import SemanticManifest
 from dbt_semantic_interfaces.type_enums.time_granularity import TimeGranularity
 from metricflow_semantics.mf_logging.pretty_print import mf_pformat
-
+from metricflow_semantics.specs.spec_classes import DEFAULT_TIME_GRANULARITY
 from metricflow.sql.sql_table import SqlTable
 
 logger = logging.getLogger(__name__)
@@ -23,7 +23,7 @@ class TimeSpineSource:
     # Name of the column in the table that contains the dates.
     time_column_name: str = "ds"
     # The time granularity of the dates in the spine table.
-    time_column_granularity: TimeGranularity = TimeGranularity.DAY
+    time_column_granularity: TimeGranularity = DEFAULT_TIME_GRANULARITY
 
     @property
     def spine_table(self) -> SqlTable:
@@ -37,10 +37,10 @@ def create_from_manifest(semantic_manifest: SemanticManifest) -> TimeSpineSource
 
         if not (
             len(time_spine_table_configurations) == 1
-            and time_spine_table_configurations[0].grain == TimeGranularity.DAY
+            and time_spine_table_configurations[0].grain == DEFAULT_TIME_GRANULARITY
         ):
             raise NotImplementedError(
-                f"Only a single time spine table configuration with {TimeGranularity.DAY} is currently "
+                f"Only a single time spine table configuration with {DEFAULT_TIME_GRANULARITY} is currently "
                 f"supported. Got:\n"
                 f"{mf_pformat(time_spine_table_configurations)}"
             )