diff --git a/corporate/lib/activity.py b/corporate/lib/activity.py
index b1111cfbbe..29db65cbfb 100644
--- a/corporate/lib/activity.py
+++ b/corporate/lib/activity.py
@@ -1,4 +1,3 @@
-import sys
 from collections import defaultdict
 from dataclasses import dataclass
 from datetime import datetime
@@ -34,13 +33,6 @@ from zilencer.models import (
     get_remote_customer_user_count,
 )
 
-if sys.version_info < (3, 9):  # nocoverage
-    from backports import zoneinfo
-else:  # nocoverage
-    import zoneinfo
-
-eastern_tz = zoneinfo.ZoneInfo("America/New_York")
-
 
 @dataclass
 class RemoteActivityPlanData:
@@ -100,9 +92,11 @@ def dictfetchall(cursor: CursorWrapper) -> List[Dict[str, Any]]:
     return [dict(zip((col[0] for col in desc), row)) for row in cursor.fetchall()]
 
 
-def format_date_for_activity_reports(date: Optional[datetime]) -> str:
+def format_optional_datetime(date: Optional[datetime], display_none: bool = False) -> str:
     if date:
-        return date.astimezone(eastern_tz).strftime("%Y-%m-%d %H:%M")
+        return date.strftime("%Y-%m-%d %H:%M")
+    elif display_none:
+        return "None"
     else:
         return ""
 
diff --git a/corporate/views/installation_activity.py b/corporate/views/installation_activity.py
index 491cef1e3c..a9bc5a00b8 100644
--- a/corporate/views/installation_activity.py
+++ b/corporate/views/installation_activity.py
@@ -15,7 +15,7 @@ from corporate.lib.activity import (
     dictfetchall,
     estimate_annual_recurring_revenue_by_realm,
     fix_rows,
-    format_date_for_activity_reports,
+    format_optional_datetime,
     get_query_data,
     get_realms_with_default_discount_dict,
     make_table,
@@ -331,15 +331,15 @@ def get_integrations_activity(request: HttpRequest) -> HttpResponse:
         "Client",
         "Realm",
         "Hits",
-        "Last time",
+        "Last time (UTC)",
     ]
 
     rows = get_query_data(query)
     for i, col in enumerate(cols):
         if col == "Realm":
             fix_rows(rows, i, realm_activity_link)
-        elif col == "Last time":
-            fix_rows(rows, i, format_date_for_activity_reports)
+        elif col == "Last time (UTC)":
+            fix_rows(rows, i, format_optional_datetime)
 
     content = make_table(title, cols, rows)
     return render(
diff --git a/corporate/views/realm_activity.py b/corporate/views/realm_activity.py
index 0ef67e3816..648a369bb3 100644
--- a/corporate/views/realm_activity.py
+++ b/corporate/views/realm_activity.py
@@ -11,7 +11,7 @@ from django.utils.timezone import now as timezone_now
 from markupsafe import Markup
 
 from corporate.lib.activity import (
-    format_date_for_activity_reports,
+    format_optional_datetime,
     make_table,
     realm_stats_link,
     user_activity_link,
@@ -116,8 +116,8 @@ def realm_user_summary_table(
         "Email",
         "User type",
         "Messages sent",
-        "Last heard from",
-        "Last message sent",
+        "Last heard from (UTC)",
+        "Last message sent (UTC)",
     ]
 
     rows = []
@@ -129,8 +129,8 @@ def realm_user_summary_table(
             user_summary.user_type,
             user_summary.messages_sent,
         ]
-        cells.append(format_date_for_activity_reports(user_summary.last_heard_from))
-        cells.append(format_date_for_activity_reports(user_summary.last_message_sent))
+        cells.append(format_optional_datetime(user_summary.last_heard_from))
+        cells.append(format_optional_datetime(user_summary.last_message_sent))
 
         row_class = ""
         if user_summary.last_heard_from and is_recent(user_summary.last_heard_from):
diff --git a/corporate/views/remote_activity.py b/corporate/views/remote_activity.py
index 3023c8d933..917cada65a 100644
--- a/corporate/views/remote_activity.py
+++ b/corporate/views/remote_activity.py
@@ -4,8 +4,8 @@ from psycopg2.sql import SQL
 
 from corporate.lib.activity import (
     fix_rows,
-    format_date_for_activity_reports,
     format_none_as_zero,
+    format_optional_datetime,
     get_plan_data_by_remote_realm,
     get_plan_data_by_remote_server,
     get_query_data,
@@ -85,7 +85,7 @@ def get_remote_server_activity(request: HttpRequest) -> HttpResponse:
         "Realm host or server hostname",
         "Server contact email",
         "Server Zulip version",
-        "Server last audit log update",
+        "Server last audit log update (UTC)",
         "Server mobile users",
         "Server mobile pushes",
         "Realm organization type",
@@ -199,7 +199,7 @@ def get_remote_server_activity(request: HttpRequest) -> HttpResponse:
     # Format column data and add total row
     for i, col in enumerate(cols):
         if i == LAST_AUDIT_LOG_DATE:
-            fix_rows(rows, i, format_date_for_activity_reports)
+            fix_rows(rows, i, format_optional_datetime)
         if i in [MOBILE_USER_COUNT, MOBILE_PUSH_COUNT]:
             fix_rows(rows, i, format_none_as_zero)
         if i == SERVER_AND_REALM_IDS:
diff --git a/corporate/views/support.py b/corporate/views/support.py
index 3ff997fcb2..01299cf146 100644
--- a/corporate/views/support.py
+++ b/corporate/views/support.py
@@ -19,7 +19,7 @@ from django.utils.translation import gettext as _
 
 from confirmation.models import Confirmation, confirmation_url
 from confirmation.settings import STATUS_USED
-from corporate.lib.activity import remote_installation_stats_link
+from corporate.lib.activity import format_optional_datetime, remote_installation_stats_link
 from corporate.lib.stripe import (
     RealmBillingSession,
     RemoteRealmBillingSession,
@@ -638,6 +638,7 @@ def remote_servers_support(
     context["get_plan_type_name"] = get_plan_type_string
     context["get_org_type_display_name"] = get_org_type_display_name
     context["format_discount"] = format_discount_percentage
+    context["format_optional_datetime"] = format_optional_datetime
     context["dollar_amount"] = cents_to_dollar_string
     context["server_analytics_link"] = remote_installation_stats_link
     context["REMOTE_PLAN_TIERS"] = get_remote_plan_tier_options()
diff --git a/corporate/views/user_activity.py b/corporate/views/user_activity.py
index 29df5b7160..b38647f795 100644
--- a/corporate/views/user_activity.py
+++ b/corporate/views/user_activity.py
@@ -4,7 +4,7 @@ from django.db.models import QuerySet
 from django.http import HttpRequest, HttpResponse
 from django.shortcuts import render
 
-from corporate.lib.activity import format_date_for_activity_reports, make_table
+from corporate.lib.activity import format_optional_datetime, make_table
 from zerver.decorator import require_server_admin
 from zerver.models import UserActivity, UserProfile
 from zerver.models.users import get_user_profile_by_id
@@ -40,7 +40,7 @@ def get_user_activity(request: HttpRequest, user_profile_id: int) -> HttpRespons
         "Query",
         "Client",
         "Count",
-        "Last visit",
+        "Last visit (UTC)",
     ]
 
     def row(record: UserActivity) -> List[Any]:
@@ -48,7 +48,7 @@ def get_user_activity(request: HttpRequest, user_profile_id: int) -> HttpRespons
             record.query,
             record.client.name,
             record.count,
-            format_date_for_activity_reports(record.last_visit),
+            format_optional_datetime(record.last_visit),
         ]
 
     rows = list(map(row, records))
diff --git a/templates/corporate/support/remote_server_support.html b/templates/corporate/support/remote_server_support.html
index 8b4fc42dfb..90528ab77e 100644
--- a/templates/corporate/support/remote_server_support.html
+++ b/templates/corporate/support/remote_server_support.html
@@ -55,6 +55,7 @@
                 <b>Has remote realms</b>: {{ remote_realms[remote_server.id] != [] }}<br />
                 <br />
                 <b>Max monthly messages</b>: {{ remote_server_to_max_monthly_messages[remote_server.id] }}<br />
+                <b>Last audit log update (UTC)</b>: {{ format_optional_datetime(remote_server.last_audit_log_update, True) }}<br />
                 <b>Plan type</b>: {{ get_plan_type_name(remote_server.plan_type) }}<br />
                 <b>Non-guest user count</b>: {{ remote_servers_support_data[remote_server.id].user_data.non_guest_user_count }}<br />
                 <b>Guest user count</b>: {{ remote_servers_support_data[remote_server.id].user_data.guest_user_count }}<br />