diff --git a/personal_data/parse_util.py b/personal_data/parse_util.py
index 878b271..d23c4a0 100644
--- a/personal_data/parse_util.py
+++ b/personal_data/parse_util.py
@@ -36,10 +36,16 @@ def parse_response_datetime(response) -> datetime.datetime:
     ).replace(tzinfo=datetime.UTC)
 
 
+LOCAL_TIMEZONE = datetime.datetime.now(datetime.timezone.utc).astimezone().tzinfo
+
+
 def parse_time(text: str) -> datetime.datetime:
     text = text.replace('\n', ' ')
     text = text.strip()
-    return datetime.datetime.strptime(text, '%d %b %Y %I:%M:%S %p')
+    time = datetime.datetime.strptime(text, '%d %b %Y %I:%M:%S %p')
+    time = time.replace(tzinfo=LOCAL_TIMEZONE)
+    assert time.tzinfo is not None, time
+    return time
 
 
 def parse_date(text: str) -> datetime.date:
diff --git a/personal_data/util.py b/personal_data/util.py
index e1d1003..536ff89 100644
--- a/personal_data/util.py
+++ b/personal_data/util.py
@@ -62,6 +62,8 @@ def csv_str_to_value(
 def csv_safe_value(v: object) -> str:
     if isinstance(v, urllib.parse.ParseResult):
         return v.geturl()
+    if isinstance(v, datetime.datetime):
+        assert v.tzinfo is not None, v
     return str(v)