diff --git a/CHANGELOG.md b/CHANGELOG.md
index ce3cd7ab6..349d23964 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 
 ### Fixed
 
+- Calendar: report multi-calendar event truncation on stderr for text output and as per-calendar page tokens in JSON. (#831) — thanks @TurboTheTurtle.
 - Docs: update the Docker authentication example to persist file-keyring tokens with `GOG_HOME`. (#828, #830) — thanks @WadydX.
 
 ## 0.28.0 - 2026-06-15
diff --git a/internal/cmd/calendar_all_events_test.go b/internal/cmd/calendar_all_events_test.go
index 3c613ba85..62b6e1e12 100644
--- a/internal/cmd/calendar_all_events_test.go
+++ b/internal/cmd/calendar_all_events_test.go
@@ -36,6 +36,7 @@ func TestListAllCalendarsEvents_JSON(t *testing.T) {
 						"attendees":   []map[string]any{{"email": "a@example.com"}},
 					},
 				},
+				"nextPageToken": "cal1-next",
 			})
 			return
 		case strings.Contains(r.URL.Path, "/calendars/cal2/events") && r.Method == http.MethodGet:
@@ -68,7 +69,8 @@ func TestListAllCalendarsEvents_JSON(t *testing.T) {
 	})
 
 	var parsed struct {
-		Events []map[string]any `json:"events"`
+		Events         []map[string]any         `json:"events"`
+		NextPageTokens []calendarEventsNextPage `json:"nextPageTokens"`
 	}
 	if err := json.Unmarshal([]byte(jsonOut), &parsed); err != nil {
 		t.Fatalf("json parse: %v", err)
@@ -76,6 +78,9 @@ func TestListAllCalendarsEvents_JSON(t *testing.T) {
 	if len(parsed.Events) != 2 {
 		t.Fatalf("unexpected events: %#v", parsed.Events)
 	}
+	if len(parsed.NextPageTokens) != 1 || parsed.NextPageTokens[0].CalendarID != "cal1" || parsed.NextPageTokens[0].NextPageToken != "cal1-next" {
+		t.Fatalf("unexpected nextPageTokens: %#v", parsed.NextPageTokens)
+	}
 }
 
 // TestListAllCalendarsEvents_SortByStart verifies that --sort=start orders
@@ -127,7 +132,8 @@ func TestListAllCalendarsEvents_SortByStart(t *testing.T) {
 	})
 
 	var parsed struct {
-		Events []map[string]any `json:"events"`
+		Events         []map[string]any         `json:"events"`
+		NextPageTokens []calendarEventsNextPage `json:"nextPageTokens"`
 	}
 	if err := json.Unmarshal([]byte(jsonOut), &parsed); err != nil {
 		t.Fatalf("json parse: %v", err)
@@ -135,6 +141,9 @@ func TestListAllCalendarsEvents_SortByStart(t *testing.T) {
 	if len(parsed.Events) != 2 {
 		t.Fatalf("expected 2 events, got %#v", parsed.Events)
 	}
+	if len(parsed.NextPageTokens) != 0 {
+		t.Fatalf("unexpected nextPageTokens: %#v", parsed.NextPageTokens)
+	}
 	if got, _ := parsed.Events[0]["id"].(string); got != "early" {
 		t.Fatalf("expected first event id 'early', got %q (events: %#v)", got, parsed.Events)
 	}
diff --git a/internal/cmd/calendar_list.go b/internal/cmd/calendar_list.go
index 759dd982c..843360f51 100644
--- a/internal/cmd/calendar_list.go
+++ b/internal/cmd/calendar_list.go
@@ -145,6 +145,7 @@ func listSelectedCalendarsEvents(ctx context.Context, svc *calendar.Service, cal
 func listCalendarIDsEvents(ctx context.Context, svc *calendar.Service, calendarIDs []string, from, to string, maxResults int64, page string, allPages bool, failEmpty bool, query, privatePropFilter, sharedPropFilter, fields string, showWeekday bool, showLocation bool, timezoneHints map[string]calendarTimezoneHint, sortKey, sortOrder string) error {
 	u := ui.FromContext(ctx)
 	all := []*eventWithCalendar{}
+	nextPages := []calendarEventsNextPage{}
 	for _, calID := range calendarIDs {
 		calID = strings.TrimSpace(calID)
 		if calID == "" {
@@ -159,11 +160,17 @@ func listCalendarIDsEvents(ctx context.Context, svc *calendar.Service, calendarI
 			return resp.Items, resp.NextPageToken, nil
 		}
 
-		events, _, err := loadPagedItems(page, allPages, fetch)
+		events, nextPageToken, err := loadPagedItems(page, allPages, fetch)
 		if err != nil {
 			u.Err().Linef("calendar %s: %v", calID, err)
 			continue
 		}
+		if nextPageToken != "" {
+			nextPages = append(nextPages, calendarEventsNextPage{
+				CalendarID:    calID,
+				NextPageToken: nextPageToken,
+			})
+		}
 
 		for _, e := range events {
 			redactCalendarEventForOutput(ctx, e)
@@ -174,7 +181,10 @@ func listCalendarIDsEvents(ctx context.Context, svc *calendar.Service, calendarI
 	sortEventsBy(all, sortKey, sortOrder)
 
 	if outfmt.IsJSON(ctx) {
-		if err := outfmt.WriteJSON(ctx, stdoutWriter(ctx), map[string]any{"events": all}); err != nil {
+		if err := outfmt.WriteJSON(ctx, stdoutWriter(ctx), map[string]any{
+			"events":         all,
+			"nextPageTokens": nextPages,
+		}); err != nil {
 			return err
 		}
 		if len(all) == 0 {
@@ -182,7 +192,31 @@ func listCalendarIDsEvents(ctx context.Context, svc *calendar.Service, calendarI
 		}
 		return nil
 	}
-	return renderCalendarEventsTable(ctx, all, "", true, showWeekday, showLocation, failEmpty, false)
+	if err := renderCalendarEventsTable(ctx, all, "", true, showWeekday, showLocation, failEmpty, false); err != nil {
+		return err
+	}
+	printCalendarEventsNextPageHint(u, len(calendarIDs), nextPages)
+	return nil
+}
+
+type calendarEventsNextPage struct {
+	CalendarID    string `json:"calendarId"`
+	NextPageToken string `json:"nextPageToken"`
+}
+
+func printCalendarEventsNextPageHint(u *ui.UI, calendarCount int, nextPages []calendarEventsNextPage) {
+	if u == nil || len(nextPages) == 0 {
+		return
+	}
+	if calendarCount == 1 {
+		printNextPageHintWithAll(u, nextPages[0].NextPageToken, "--all-pages")
+		return
+	}
+	if len(nextPages) == 1 {
+		u.Err().Linef("# More results: use --all-pages to fetch every page (%s has more results)", nextPages[0].CalendarID)
+		return
+	}
+	u.Err().Linef("# More results: use --all-pages to fetch every page (%d calendars have more results)", len(nextPages))
 }
 
 func renderCalendarEventsTable(ctx context.Context, events []*eventWithCalendar, nextPageToken string, includeCalendar, showWeekday, showLocation, failEmpty bool, printPageHint bool) error {
diff --git a/internal/cmd/execute_calendar_events_text_test.go b/internal/cmd/execute_calendar_events_text_test.go
index b352af183..c61f42a7e 100644
--- a/internal/cmd/execute_calendar_events_text_test.go
+++ b/internal/cmd/execute_calendar_events_text_test.go
@@ -100,3 +100,60 @@ func TestExecute_CalendarEvents_Text_All(t *testing.T) {
 		t.Fatalf("unexpected out=%q", out)
 	}
 }
+
+func TestExecute_CalendarEvents_Text_AllWithPagingHint(t *testing.T) {
+	srv := httptest.NewServer(withPrimaryCalendar(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case strings.Contains(r.URL.Path, "/users/me/calendarList"):
+			w.Header().Set("Content-Type", "application/json")
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"items": []map[string]any{
+					{"id": "c1"},
+					{"id": "c2"},
+				},
+			})
+			return
+		case strings.Contains(r.URL.Path, "/calendars/c1/events"):
+			w.Header().Set("Content-Type", "application/json")
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"items": []map[string]any{
+					{"id": "e1", "summary": "S1", "start": map[string]any{"dateTime": "2025-12-17T10:00:00Z"}, "end": map[string]any{"dateTime": "2025-12-17T11:00:00Z"}},
+				},
+				"nextPageToken": "c1-next",
+			})
+			return
+		case strings.Contains(r.URL.Path, "/calendars/c2/events"):
+			w.Header().Set("Content-Type", "application/json")
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"items": []map[string]any{
+					{"id": "e2", "summary": "S2", "start": map[string]any{"dateTime": "2025-12-17T12:00:00Z"}, "end": map[string]any{"dateTime": "2025-12-17T13:00:00Z"}},
+				},
+			})
+			return
+		default:
+			http.NotFound(w, r)
+			return
+		}
+	})))
+	defer srv.Close()
+
+	svc, err := calendar.NewService(context.Background(),
+		option.WithoutAuthentication(),
+		option.WithHTTPClient(srv.Client()),
+		option.WithEndpoint(srv.URL+"/"),
+	)
+	if err != nil {
+		t.Fatalf("NewService: %v", err)
+	}
+	result := executeWithCalendarTestService(t, []string{"--account", "a@b.com", "calendar", "events", "--all", "--from", "2025-12-17T00:00:00Z", "--to", "2025-12-18T00:00:00Z"}, svc)
+	if result.err != nil {
+		t.Fatalf("Execute: %v", result.err)
+	}
+	if !strings.Contains(result.stderr, "# More results: use --all-pages to fetch every page (c1 has more results)") {
+		t.Fatalf("unexpected stderr=%q", result.stderr)
+	}
+	out := result.stdout
+	if !strings.Contains(out, "CALENDAR") || !strings.Contains(out, "c1") || !strings.Contains(out, "e1") || !strings.Contains(out, "S1") || !strings.Contains(out, "c2") || !strings.Contains(out, "e2") || !strings.Contains(out, "S2") {
+		t.Fatalf("unexpected out=%q", out)
+	}
+}