diff --git a/home/doris-barbell/app/routes/ui.py b/home/doris-barbell/app/routes/ui.py
index 07b5699..8f2f260 100644
--- a/home/doris-barbell/app/routes/ui.py
+++ b/home/doris-barbell/app/routes/ui.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+from datetime import datetime
+
 from fastapi import APIRouter, Form, HTTPException, Request, status
 from fastapi.responses import RedirectResponse
 from fastapi.templating import Jinja2Templates
@@ -132,7 +134,7 @@ def routine_log_sheet(request: Request, routine_id: str):
             'routine': routine,
             'routine_sheet': _build_routine_log_sheet(routine),
             'routine_action_label': _routine_action_label(routine['name']),
-            'default_performed_at': '',
+            'default_performed_at': _default_performed_at_value(),
         },
     )
 
@@ -290,6 +292,10 @@ def _default_reps_value(target_reps: str | None) -> str:
     return cleaned if cleaned.isdigit() else ''
 
 
+def _default_performed_at_value() -> str:
+    return datetime.now().astimezone().strftime('%Y-%m-%dT%H:%M')
+
+
 def _routine_action_label(routine_name: str) -> str:
     if ': ' in routine_name:
         label = routine_name.split(': ', 1)[1].strip().lower()
diff --git a/home/doris-barbell/tests/test_app.py b/home/doris-barbell/tests/test_app.py
index 6b5e815..8b129ba 100644
--- a/home/doris-barbell/tests/test_app.py
+++ b/home/doris-barbell/tests/test_app.py
@@ -1,4 +1,5 @@
 import json
+import re
 from pathlib import Path
 
 from fastapi.testclient import TestClient
@@ -390,6 +391,7 @@ def test_seeded_routine_can_render_prefilled_log_sheet(tmp_path: Path) -> None:
     assert 'name="exercise_0_set_0_reps"' in body
     assert 'name="exercise_0_set_0_weight_lbs"' in body
     assert 'value="10"' in body
+    assert re.search(r'name="performed_at" value="\d{4}-\d{2}-\d{2}T\d{2}:\d{2}"', body)
 
 
 def test_seeded_routine_log_submission_creates_structured_workout(tmp_path: Path) -> None: