Use string date instead or reparsing

source/js/VMM.Slider.Slide.js

@@ -84,8 +84,8 @@ if (typeof VMM.Slider != 'undefined') {
 			if (data.startdate != null && data.startdate != "") {
 				if (type.of(data.startdate) == "date") {
 					if (data.type != "start") {
-						var st = VMM.Util.date.prettyDate(data.startdate);
-						var en = VMM.Util.date.prettyDate(data.enddate);
+						var st = data.startdate_str;
+						var en = data.enddate_str;
 						if (st != en) {
 							c.text += VMM.createElement("h2", st + " — " + en + "", "date");
 						} else {

source/js/VMM.Slider.js

@@ -495,7 +495,7 @@ if(typeof VMM != 'undefined' && typeof VMM.Slider == 'undefined') {
 						VMM.attachElement(navigation.prevDate, _title);
 						VMM.attachElement(navigation.prevTitle, "");
 					} else {
-						VMM.attachElement(navigation.prevDate, data[current_slide - 1].date);
+						VMM.attachElement(navigation.prevDate, data[current_slide - 1].startdate_str);
 						VMM.attachElement(navigation.prevTitle, _title);
 					}
 				} else {
@@ -513,7 +513,7 @@ if(typeof VMM != 'undefined' && typeof VMM.Slider == 'undefined') {
 						VMM.attachElement(navigation.nextDate, _title);
 						VMM.attachElement(navigation.nextTitle, "");
 					} else {
-						VMM.attachElement(navigation.nextDate, data[current_slide + 1].date);
+						VMM.attachElement(navigation.nextDate, data[current_slide + 1].startdate_str);
 						VMM.attachElement(navigation.nextTitle, _title);
 					}
 				} else {