diff --git a/src/edr_pydantic/extent.py b/src/edr_pydantic/extent.py
index cb5dfd6..3381e7c 100644
--- a/src/edr_pydantic/extent.py
+++ b/src/edr_pydantic/extent.py
@@ -2,7 +2,9 @@
 from typing import Optional
 from typing import Union
 
+from annotated_types import Len
 from pydantic import AwareDatetime
+from typing_extensions import Annotated
 
 from .base_model import EdrBaseModel
 
@@ -12,9 +14,11 @@ class Spatial(EdrBaseModel):
     crs: str
 
 
+IntervalLen = Len(min_length=2, max_length=2)
+
+
 class Temporal(EdrBaseModel):
-    # TODO: Validate this list has two items (C.7.  Temporal Object)
-    interval: List[List[AwareDatetime]]
+    interval: List[Annotated[List[AwareDatetime], IntervalLen]]
     # TODO: Validate this is a list of ISO 8601 single time, ISO 8601 time duration or ISO 8601 interval
     values: List[str]
     trs: str
diff --git a/tests/test_data/temporal-interval.json b/tests/test_data/temporal-interval.json
new file mode 100644
index 0000000..9e823f6
--- /dev/null
+++ b/tests/test_data/temporal-interval.json
@@ -0,0 +1,11 @@
+{
+    "interval": [
+        [
+            "2020-04-19T11:00:00Z"
+        ]
+    ],
+    "values": [
+        "2020-04-19T11:00:00Z/2020-06-30T09:00:00Z"
+    ],
+    "trs": "TIMECRS[\"DateTime\",TDATUM[\"Gregorian Calendar\"],CS[TemporalDateTime,1],AXIS[\"Time (T)\",future]]"
+}
diff --git a/tests/test_edr.py b/tests/test_edr.py
index 7064a10..254a281 100644
--- a/tests/test_edr.py
+++ b/tests/test_edr.py
@@ -7,6 +7,7 @@
 from edr_pydantic.collections import Collections
 from edr_pydantic.collections import Instance
 from edr_pydantic.extent import Extent
+from edr_pydantic.extent import Temporal
 from edr_pydantic.parameter import Parameter
 from edr_pydantic.unit import Unit
 from pydantic import RootModel
@@ -35,7 +36,10 @@ def test_happy_cases(file_name, object_type):
     assert object_type.model_validate_json(json_string).model_dump_json(exclude_none=True) == json_string
 
 
-error_cases = [("label-or-symbol-unit.json", Unit, r"Either 'label' or 'symbol' should be set")]
+error_cases = [
+    ("label-or-symbol-unit.json", Unit, r"Either 'label' or 'symbol' should be set"),
+    ("temporal-interval.json", Temporal, r"List should have at least 2 items after validation"),
+]
 
 
 @pytest.mark.parametrize("file_name, object_type, error_message", error_cases)
diff --git a/tests/test_extent.py b/tests/test_extent.py
new file mode 100644
index 0000000..c0663ea
--- /dev/null
+++ b/tests/test_extent.py
@@ -0,0 +1,6 @@
+from edr_pydantic.extent import IntervalLen
+
+
+def test_interval_len():
+    assert IntervalLen.min_length == 2, "Temporal intervals must have at least 2 items"
+    assert IntervalLen.max_length == 2, "Temporal intervals must have at most 2 items"