convert timesheets to UTC with support for user timezone (#372)

src/Twig/DateExtensions.php

@@ -40,6 +40,7 @@ class DateExtensions extends \Twig_Extension
             new TwigFilter('month_name', [$this, 'monthName']),
             new TwigFilter('date_short', [$this, 'dateShort']),
             new TwigFilter('date_time', [$this, 'dateTime']),
+            new TwigFilter('time', [$this, 'time']),
         ];
     }
 
@@ -65,6 +66,15 @@ class DateExtensions extends \Twig_Extension
         return date_format($date, $format);
     }
 
+    /**
+     * @param DateTime $date
+     * @return string
+     */
+    public function time(DateTime $date)
+    {
+        return date_format($date, 'H:i');
+    }
+
     /**
      * @param \DateTime $date
      * @return string