diff --git a/memos/indexing.py b/memos/indexing.py
index 1a0b805..beed369 100644
--- a/memos/indexing.py
+++ b/memos/indexing.py
@@ -174,6 +174,8 @@ def search_entities(
     folder_id: int = None,
     limit: int = 48,
     offset: int = 0,
+    start: int = None,
+    end: int = None,
 ) -> List[EntitySearchResult]:
     try:
         filter_by = []
@@ -181,6 +183,8 @@ def search_entities(
             filter_by.append(f"library_id:={library_id}")
         if folder_id is not None:
             filter_by.append(f"folder_id:={folder_id}")
+        if start is not None and end is not None:
+            filter_by.append(f"file_created_at:={start}..{end}")
 
         filter_by_str = " && ".join(filter_by) if filter_by else ""
         search_parameters = {
diff --git a/memos/server.py b/memos/server.py
index 54e0edd..359d14b 100644
--- a/memos/server.py
+++ b/memos/server.py
@@ -450,10 +450,14 @@ async def search_entities(
     folder_id: int = None,
     limit: Annotated[int, Query(ge=1, le=200)] = 48,
     offset: int = 0,
+    start: int = None,
+    end: int = None,
     db: Session = Depends(get_db),
 ):
     try:
-        return indexing.search_entities(client, q, library_id, folder_id, limit, offset)
+        return indexing.search_entities(
+            client, q, library_id, folder_id, limit, offset, start, end
+        )
     except Exception as e:
         print(f"Error searching entities: {e}")
         raise HTTPException(