diff --git a/frigate/api/export.py b/frigate/api/export.py
index f0d93bc105..5873a565c8 100644
--- a/frigate/api/export.py
+++ b/frigate/api/export.py
@@ -12,6 +12,7 @@ from collections import deque
 from collections.abc import Iterator
 from pathlib import Path
 from urllib.parse import quote
+from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
 
 import psutil
 from fastapi import APIRouter, Depends, Query, Request
@@ -81,7 +82,7 @@ from frigate.record.export import (
 )
 from frigate.util.path import sanitize_contained_path
 from frigate.util.recording_coverage import recording_overlap
-from frigate.util.time import is_current_hour
+from frigate.util.time import get_normalized_tz_name, is_current_hour
 
 logger = logging.getLogger(__name__)
 
@@ -442,7 +443,29 @@ def _unique_archive_name(export: Export, used: set[str]) -> str:
     return candidate
 
 
-def _stream_case_archive(exports: list[Export]) -> Iterator[bytes]:
+def _archive_entry(
+    export: Export, arcname: str, tz_name: str | None
+) -> zipfile.ZipInfo:
+    """Zip entry stamped with the export's recording start time.
+
+    Zip times carry no zone and extractors read them as local time, so the
+    timestamp is converted with the UI timezone rather than the container's.
+    """
+    tz = None
+    if tz_name:
+        try:
+            tz = ZoneInfo(get_normalized_tz_name(tz_name))
+        except (ValueError, ZoneInfoNotFoundError):
+            pass
+
+    start = datetime.datetime.fromtimestamp(float(export.date), tz=tz)
+
+    # zip can't represent dates before 1980
+    date_time = max(start.timetuple()[:6], (1980, 1, 1, 0, 0, 0))
+    return zipfile.ZipInfo(arcname, date_time=date_time)
+
+
+def _stream_case_archive(exports: list[Export], tz_name: str | None) -> Iterator[bytes]:
     """Yield bytes of a zip archive built from the given exports' mp4 files."""
     buffer = _StreamingZipBuffer()
     used_names: set[str] = set()
@@ -460,9 +483,10 @@ def _stream_case_archive(exports: list[Export]) -> Iterator[bytes]:
                 continue
 
             arcname = _unique_archive_name(export, used_names)
+            zinfo = _archive_entry(export, arcname, tz_name)
 
             with (
-                archive.open(arcname, mode="w", force_zip64=True) as entry,
+                archive.open(zinfo, mode="w", force_zip64=True) as entry,
                 source.open("rb") as src,
             ):
                 while True:
@@ -501,6 +525,7 @@ def _content_disposition(filename: str, ascii_fallback: str) -> str:
     description="Streams a zip archive containing every completed export's mp4 for the given case.",
 )
 def download_export_case(
+    request: Request,
     case_id: str,
     allowed_cameras: list[str] = Depends(get_allowed_cameras_for_filter),
 ):
@@ -533,7 +558,7 @@ def download_export_case(
         archive_base = case_id
 
     return StreamingResponse(
-        _stream_case_archive(exports),
+        _stream_case_archive(exports, request.app.frigate_config.ui.timezone),
         media_type="application/zip",
         headers={
             "Content-Disposition": _content_disposition(
diff --git a/frigate/test/test_export.py b/frigate/test/test_export.py
index 12b13477bb..8d4c688b19 100644
--- a/frigate/test/test_export.py
+++ b/frigate/test/test_export.py
@@ -4,7 +4,7 @@ import unittest
 from pathlib import Path
 from unittest.mock import MagicMock, patch
 
-from frigate.api.export import _unique_archive_name
+from frigate.api.export import _archive_entry, _unique_archive_name
 from frigate.const import MAX_PLAYLIST_SECONDS
 from frigate.models import Export
 from frigate.record.export import (
@@ -220,6 +220,38 @@ class TestUniqueArchiveName(unittest.TestCase):
         )
 
 
+class TestArchiveEntry(unittest.TestCase):
+    """Tests for the modified time stamped on case download zip entries."""
+
+    def build_export(self) -> Export:
+        return Export(
+            id="front_door_abc123",
+            camera="front_door",
+            name="front door",
+            date=1756000000.0,
+            video_path="/media/frigate/exports/front_door_abc123.mp4",
+            thumb_path="/media/frigate/exports/front_door_abc123.webp",
+            in_progress=False,
+        )
+
+    def test_uses_start_time_in_ui_timezone(self):
+        zinfo = _archive_entry(self.build_export(), "a.mp4", "America/New_York")
+        self.assertEqual(zinfo.date_time, (2025, 8, 23, 21, 46, 40))
+
+    def test_clamps_dates_before_1980(self):
+        export = self.build_export()
+        export.date = 100
+        zinfo = _archive_entry(export, "a.mp4", "UTC")
+        self.assertEqual(zinfo.date_time, (1980, 1, 1, 0, 0, 0))
+
+    def test_invalid_timezone_falls_back_to_local_time(self):
+        zinfo = _archive_entry(self.build_export(), "a.mp4", "Not/A_Real_Zone")
+        self.assertEqual(
+            zinfo.date_time,
+            _archive_entry(self.build_export(), "a.mp4", None).date_time,
+        )
+
+
 if __name__ == "__main__":
     unittest.main()