Show last update check time in local timezone

admin.go

@@ -584,6 +584,7 @@ func handleViewAdminUpdates(app *App, u *User, w http.ResponseWriter, r *http.Re
 	p := struct {
 		*UserPage
 		LastChecked           string
+		LastChecked8601       string
 		LatestVersion         string
 		LatestReleaseNotesURL string
 		UpdateAvailable       bool
@@ -592,6 +593,7 @@ func handleViewAdminUpdates(app *App, u *User, w http.ResponseWriter, r *http.Re
 	}
 	if app.cfg.App.UpdateChecks {
 		p.LastChecked = app.updates.lastCheck.Format("January 2, 2006, 3:04 PM")
+		p.LastChecked8601 = app.updates.lastCheck.Format("2006-01-02T15:04:05Z")
 		p.LatestVersion = app.updates.LatestVersion()
 		p.LatestReleaseNotesURL = app.updates.ReleaseNotesURL()
 		p.UpdateAvailable = app.updates.AreAvailable()

templates/user/admin/app-updates.tmpl

@@ -15,7 +15,14 @@
     For details on features, bug fixes or notes on upgrading, <a href="{{.LatestReleaseNotesURL}}">read the release notes</a>.
   </section>
   {{end}}
-  <p>Last checked at: {{.LastChecked}}. <a href="/admin/updates?check=now">Check now</a>.</p>
+	<p>Last checked at: <time class="dt-published" datetime="{{.LastChecked8601}}">{{.LastChecked}}</time>. <a href="/admin/updates?check=now">Check now</a>.</p>
+
+	<script>
+	// Code modified from /js/localdate.js
+	var displayEl = document.querySelector("time");
+	var d = new Date(displayEl.getAttribute("datetime"));
+	displayEl.textContent = d.toLocaleDateString(navigator.language || "en-US", { dateStyle: 'long', timeStyle: 'short' });
+	</script>
 
 {{template "footer" .}}