diff --git a/personal_data/fetchers/wanikani_lessons.py b/personal_data/fetchers/wanikani_lessons.py
index 909293f..575ac36 100644
--- a/personal_data/fetchers/wanikani_lessons.py
+++ b/personal_data/fetchers/wanikani_lessons.py
@@ -1,5 +1,6 @@
 import dataclasses
 import datetime
+from email.utils import parsedate_to_datetime
 import logging
 from collections.abc import Iterator, Mapping
 
@@ -88,7 +89,11 @@ class WaniKaniSummaryFetcher(Scraper):
         total_lessons = sum(len(lesson.get('subject_ids', [])) for lesson in lessons)
 
         reviews = data.get('data', {}).get('reviews', [])
-        now = datetime.datetime.now(datetime.timezone.utc)
+        date_hdr = response.headers.get("Date")
+        try:
+            now = parsedate_to_datetime(date_hdr) if date_hdr else datetime.datetime.now(datetime.timezone.utc)
+        except Exception:
+            now = datetime.datetime.now(datetime.timezone.utc)
         total_reviews = 0
         for review in reviews:
             available_at_str = review.get('available_at')