diff --git a/diracx-db/src/diracx/db/sql/utils/base.py b/diracx-db/src/diracx/db/sql/utils/base.py
index 5f04ba9c..dfe6baa8 100644
--- a/diracx-db/src/diracx/db/sql/utils/base.py
+++ b/diracx-db/src/diracx/db/sql/utils/base.py
@@ -232,7 +232,7 @@ def find_time_resolution(value):
     if isinstance(value, datetime):
         return None, value
     if match := re.fullmatch(
-        r"\d{4}(-\d{2}(-\d{2}(([ T])\d{2}(:\d{2}(:\d{2}(\.\d{6}Z?)?)?)?)?)?)?", value
+        r"\d{4}(-\d{2}(-\d{2}(([ T])\d{2}(:\d{2}(:\d{2}(\.\d{1,6}Z?)?)?)?)?)?)?", value
     ):
         if match.group(6):
             precision, pattern = "SECOND", r"\1-\2-\3 \4:\5:\6"
@@ -249,7 +249,7 @@ def find_time_resolution(value):
         return (
             precision,
             re.sub(
-                r"^(\d{4})-?(\d{2})?-?(\d{2})?[ T]?(\d{2})?:?(\d{2})?:?(\d{2})?\.?(\d{6})?Z?$",
+                r"^(\d{4})-?(\d{2})?-?(\d{2})?[ T]?(\d{2})?:?(\d{2})?:?(\d{2})?\.?(\d{1,6})?Z?$",
                 pattern,
                 value,
             ),
diff --git a/diracx-db/src/diracx/db/sql/utils/functions.py b/diracx-db/src/diracx/db/sql/utils/functions.py
index 17e1d155..b327c1ca 100644
--- a/diracx-db/src/diracx/db/sql/utils/functions.py
+++ b/diracx-db/src/diracx/db/sql/utils/functions.py
@@ -47,7 +47,8 @@ class date_trunc(expression.FunctionElement):  # noqa: N801
     """
 
     type = DateTime()
-    inherit_cache = True
+    # Cache does not work as intended with time resolution values, so we disable it
+    inherit_cache = False
 
     def __init__(self, *args, time_resolution, **kwargs) -> None:
         super().__init__(*args, **kwargs)
diff --git a/diracx-routers/pyproject.toml b/diracx-routers/pyproject.toml
index c70f08c4..d99a51cc 100644
--- a/diracx-routers/pyproject.toml
+++ b/diracx-routers/pyproject.toml
@@ -35,7 +35,7 @@ dependencies = [
 dynamic = ["version"]
 
 [project.optional-dependencies]
-testing = ["diracx-testing", "moto[server]", "pytest-httpx"]
+testing = ["diracx-testing", "moto[server]", "pytest-httpx", "freezegun",]
 types = [
     "boto3-stubs",
     "types-aiobotocore[essential]",
diff --git a/diracx-routers/tests/test_job_manager.py b/diracx-routers/tests/test_job_manager.py
index 0084c138..0ae0d0b1 100644
--- a/diracx-routers/tests/test_job_manager.py
+++ b/diracx-routers/tests/test_job_manager.py
@@ -5,6 +5,7 @@
 
 import pytest
 from fastapi.testclient import TestClient
+from freezegun import freeze_time
 
 from diracx.core.models import JobStatus
 
@@ -255,6 +256,244 @@ def test_insert_malformed_jdl(normal_user_client):
     assert r.status_code == 400, r.json()
 
 
+@freeze_time("2024-01-01T00:00:00.123456Z")
+def test_insert_and_search_by_datetime(normal_user_client):
+    """Test inserting a job and then searching for it.
+
+    Focus on the SubmissionTime parameter.
+    """
+    # job_definitions = [TEST_JDL%(normal_user_client.dirac_token_payload)]
+    job_definitions = [TEST_JDL]
+    r = normal_user_client.post("/api/jobs/jdl", json=job_definitions)
+    listed_jobs = r.json()
+    assert r.status_code == 200, listed_jobs
+    assert len(listed_jobs) == len(job_definitions)
+
+    # 1.1 Search for all jobs submitted in 2024
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "eq",
+                    "value": "2024",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+    # 1.2 Search for all jobs submitted before 2024
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "lt",
+                    "value": "2024",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 0
+
+    # 2.1 Search for all jobs submitted after 2024-01
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "gt",
+                    "value": "2024-01",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 0
+
+    # 2.2 Search for all jobs submitted before 2024-02
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "lt",
+                    "value": "2024-02",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+    # 3 Search for all jobs submitted during 2024-01-01
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "eq",
+                    "value": "2024-01-01",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+    # 4.1 Search for all jobs submitted during 2024-01-01 00
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "eq",
+                    "value": "2024-01-01 00",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+    # 4.2 Search for all jobs submitted during 2024-01-01T00 (with the 'T' separator)
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "eq",
+                    "value": "2024-01-01T00",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+    # 4.3 Search for all jobs not submitted during 2024-01-01 01
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "neq",
+                    "value": "2024-01-01 01",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+    # 5.1 Search for all jobs submitted after 2024-01-01 00:00:00
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "gt",
+                    "value": "2024-01-01 00:00:00",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 0
+
+    # 5.2 Search for all jobs not submitted on 2024-01-01 00:00:00
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "neq",
+                    "value": "2024-01-01 00:00:00",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 0
+
+    # 5.3 Search for all jobs submitted on 2024-01-01 00:00:00
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "eq",
+                    "value": "2024-01-01 00:00:00",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+    # 6.1 Search for all jobs submitted on 2024-01-01 00:00:00.123456
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "eq",
+                    "value": "2024-01-01 00:00:00.123456",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+    # 6.2 Search for all jobs submitted on 2024-01-01 00:00:00.123456Z
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "eq",
+                    "value": "2024-01-01 00:00:00.123456Z",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+    # 6.3 Search for all jobs submitted on 2024-01-01 00:00:00.123Z
+    r = normal_user_client.post(
+        "/api/jobs/search",
+        json={
+            "search": [
+                {
+                    "parameter": "SubmissionTime",
+                    "operator": "eq",
+                    "value": "2024-01-01 00:00:00.123Z",
+                }
+            ]
+        },
+    )
+    assert r.status_code == 200, r.json()
+    assert len(r.json()) == 1
+
+
 def test_search_distinct(normal_user_client):
     """Test that the distinct parameter works as expected."""
     job_definitions = [TEST_JDL, TEST_JDL, TEST_JDL]