bonus:

added a '(late)' timestamp in the monitor when a timestamp arrives > 60 seconds late.

atdb/taskdatabase/services/algorithms.py

@@ -4,6 +4,7 @@
     Description:  Business logic for ATDB. These functions are called from the views (views.py).
 """
 
+from datetime import datetime, timedelta
 from django.db.models import Q, Sum
 import logging
 from .common import timeit
@@ -261,7 +262,14 @@ def convert_monitor_to_html(request, monitor_data):
             line += "<td><b>" + link_to_service_history + "</b></td>"
             line += "<td>" + str(record.hostname) + "</td>"
             line += '<td class="' + record.status + '" >' + str(record.status) + "</td>"
-            line += "<td>" + str(record.timestamp) + "</td>"
+
+            d1 = datetime.utcnow().replace(tzinfo=None)
+            d2 = record.timestamp.replace(tzinfo=None)
+            delta = d1 - d2
+            if delta.seconds > 60:
+                line += '<td class="error">' + str(record.timestamp.strftime(TIME_FORMAT)) + " - (late)</td>"
+            else:
+                line += '<td>' + str(record.timestamp) + "</td>"
             line += "<td>" + str(record.process_id) + "</td>"
             line += "<td>" + str(record.description) + "</td>"
             line += "</tr>"