Add global Gantt chart for all projects

app/Model/DateParser.php

@@ -77,7 +77,7 @@ class DateParser extends Base
     }
 
     /**
-     * Parse a date ad return a unix timestamp, try different date formats
+     * Parse a date and return a unix timestamp, try different date formats
      *
      * @access public
      * @param  string   $value   Date to parse
@@ -96,6 +96,18 @@ class DateParser extends Base
         return 0;
     }
 
+    /**
+     * Get ISO8601 date from user input
+     *
+     * @access public
+     * @param  string   $value   Date to parse
+     * @return string
+     */
+    public function getIsoDate($value)
+    {
+        return date('Y-m-d', ctype_digit($value) ? $value : $this->getTimestamp($value));
+    }
+
     /**
      * Get all combinations of date/time formats
      *