Add Show Calendar button

frappe/desk/doctype/calendar_view/calendar_view.js

@@ -5,6 +5,12 @@ frappe.ui.form.on('Calendar View', {
 	onload: function(frm) {
 		frm.trigger('reference_doctype');
 	},
+	refresh: function(frm) {
+		if (!frm.is_new()) {
+			frm.add_custom_button(__('Show Calendar'),
+				() => frappe.set_route('List', frm.doc.reference_doctype, 'Calendar', frm.doc.name))
+		}
+	},
 	reference_doctype: function(frm) {
 		const { reference_doctype } = frm.doc;
 		if (!reference_doctype) return;

frappe/public/js/frappe/views/calendar/calendar.js

@@ -43,7 +43,12 @@ frappe.views.CalendarView = frappe.views.ListRenderer.extend({
 		if(!should_refresh) {
 			this.last_calendar_view = this.current_calendar_view || '';
 			this.current_calendar_view = this.get_calendar_view();
-			this.page_title = __(this.get_calendar_view());
+
+			if (this.current_calendar_view !== 'Default') {
+				this.page_title = __(this.current_calendar_view);
+			} else {
+				this.page_title = this.doctype + ' ' + __('Calendar');
+			}
 
 			should_refresh = this.current_calendar_view !== this.last_calendar_view;
 		}