fix timestamps

static/js/task.js

@@ -615,7 +615,16 @@ function formatUserDateTime(value) {
     return '--/--/---- --:--';
   }
 
-  const parsedDate = new Date(value);
+  let normalizedValue = value;
+  if (typeof normalizedValue === 'string') {
+    const trimmed = normalizedValue.trim();
+    const hasTimezone = /(?:Z|[+-]\d{2}:\d{2})$/i.test(trimmed);
+    if (!hasTimezone) {
+      normalizedValue = `${trimmed.replace(' ', 'T')}Z`;
+    }
+  }
+
+  const parsedDate = new Date(normalizedValue);
   if (Number.isNaN(parsedDate.getTime())) {
     return '--/--/---- --:--';
   }

task_database.py

@@ -333,6 +333,8 @@ def __datetime_to_iso(value) -> str | None:
     if value is None:
         return None
     if isinstance(value, datetime):
+        if value.tzinfo is None:
+            value = value.replace(tzinfo=timezone.utc)
         return value.isoformat()
     return str(value)
 

user_dao.py

@@ -1,7 +1,7 @@
 from math import floor
 import tasklists
 from dataclasses import dataclass
-from datetime import datetime
+from datetime import datetime, timezone
 from bson.objectid import ObjectId
 from task_types import UserTaskList, TierProgress, UserCompletedTask, UserCurrentTask, TaskData, PageTask, CollectionLogVerificationData
 
@@ -116,6 +116,8 @@ def completed_date_to_iso(value) -> str | None:
             if value is None:
                 return None
             if isinstance(value, datetime):
+                if value.tzinfo is None:
+                    value = value.replace(tzinfo=timezone.utc)
                 return value.isoformat()
             if isinstance(value, str):
                 parsed = None
@@ -124,6 +126,8 @@ def completed_date_to_iso(value) -> str | None:
                 except ValueError:
                     pass
                 if parsed is not None:
+                    if parsed.tzinfo is None:
+                        parsed = parsed.replace(tzinfo=timezone.utc)
                     return parsed.isoformat()
                 return value
             return str(value)