diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 189f45c60f8f..3b7bc298366f 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -75,6 +75,7 @@ Changelog
  * Maintenance: Simplify code for registering page listing action buttons (Matt Westcott)
  * Maintenance: Removed the unused, legacy, Wagtail userbar views set up for an old iframe approach (Sage Abdullah)
  * Maintenance: Optimise `lru_cache` usage (Jake Howard)
+ * Maintenance: Implement `date_since`` in `get_most_popular`` inside `search_promotions.models.Query (TopDevPros)
 
 
 5.1.2 (25.09.2023)
diff --git a/docs/releases/5.2.md b/docs/releases/5.2.md
index a0b1f7012565..c9660a535fc1 100644
--- a/docs/releases/5.2.md
+++ b/docs/releases/5.2.md
@@ -96,6 +96,7 @@ depth: 1
  * Simplify code for registering page listing action buttons (Matt Westcott)
  * Removed the unused, legacy, Wagtail userbar views set up for an old iframe approach (Sage Abdullah)
  * Optimise `lru_cache` usage (Jake Howard)
+ * Implement `date_since`` in `get_most_popular`` inside `search_promotions.models.Query (TopDevPros)
 
 
 ## Upgrade considerations - changes affecting all projects
diff --git a/wagtail/contrib/search_promotions/models.py b/wagtail/contrib/search_promotions/models.py
index 28a0655322d5..49610caddb7b 100644
--- a/wagtail/contrib/search_promotions/models.py
+++ b/wagtail/contrib/search_promotions/models.py
@@ -56,10 +56,13 @@ def get(cls, query_string):
 
     @classmethod
     def get_most_popular(cls, date_since=None):
-        # TODO: Implement date_since
+        objects = cls.objects.filter(daily_hits__isnull=False)
+
+        if date_since:
+            objects = objects.filter(daily_hits__date__gte=date_since)
+
         return (
-            cls.objects.filter(daily_hits__isnull=False)
-            .annotate(_hits=models.Sum("daily_hits__hits"))
+            objects.annotate(_hits=models.Sum("daily_hits__hits"))
             .distinct()
             .order_by("-_hits")
         )
diff --git a/wagtail/contrib/search_promotions/tests.py b/wagtail/contrib/search_promotions/tests.py
index 168e0e3c0c4b..4d29e0b7dd09 100644
--- a/wagtail/contrib/search_promotions/tests.py
+++ b/wagtail/contrib/search_promotions/tests.py
@@ -78,6 +78,69 @@ def test_search_pick_ordering(self):
             Query.get("root page").editors_picks.last().description, "Last search pick"
         )
 
+    def test_get_most_popular(self):
+        popularQuery = Query.get("popular")
+        for i in range(5):
+            popularQuery.add_hit()
+        SearchPromotion.objects.create(
+            query=Query.get("popular"),
+            page_id=2,
+            sort_order=0,
+            description="Popular search pick",
+        )
+        SearchPromotion.objects.create(
+            query=Query.get("uninteresting"),
+            page_id=1,
+            sort_order=2,
+            description="Uninteresting search pick",
+        )
+
+        # Check
+        self.assertEqual(Query.get_most_popular().count(), 1)
+        popular_picks = Query.get("popular").editors_picks.first()
+        self.assertEqual(
+            popular_picks.description,
+            "Popular search pick",
+        )
+        self.assertEqual(popular_picks.query.hits, 5)
+
+    def test_get_most_popular_since(self):
+        TODAY = date.today()
+        TWO_DAYS_AGO = TODAY - timedelta(days=2)
+        FIVE_DAYS_AGO = TODAY - timedelta(days=5)
+
+        popularQuery = Query.get("popular")
+        for i in range(5):
+            popularQuery.add_hit(date=FIVE_DAYS_AGO)
+
+        surpriseQuery = Query.get("surprise")
+        surpriseQuery.add_hit(date=TODAY)
+        surpriseQuery.add_hit(date=TWO_DAYS_AGO)
+        surpriseQuery.add_hit(date=FIVE_DAYS_AGO)
+        SearchPromotion.objects.create(
+            query=Query.get("popular"),
+            page_id=2,
+            sort_order=0,
+            description="Popular search pick",
+        )
+        SearchPromotion.objects.create(
+            query=Query.get("surprise"),
+            page_id=2,
+            sort_order=2,
+            description="Surprising search pick",
+        )
+
+        # Check
+        most_popular_queries = Query.get_most_popular(date_since=TWO_DAYS_AGO)
+        self.assertEqual(most_popular_queries.count(), 1)
+        editors_picks = Query.get("surprise").editors_picks
+        surprise_picks = editors_picks.first()
+        self.assertEqual(
+            surprise_picks.description,
+            "Surprising search pick",
+        )
+        self.assertEqual(surprise_picks.query.hits, 3)
+
 
 class TestGetSearchPromotionsTemplateTag(TestCase):
     def test_get_search_promotions_template_tag(self):