timetrack2: Fix date handling w.r.t. DST

1 files changed, 9 insertions, 5 deletions

diff --git a/modules/timetrack2/timetrack.html b/modules/timetrack2/timetrack.html
index 209458d..1925a26 100644
--- a/modules/timetrack2/timetrack.html
+++ b/modules/timetrack2/timetrack.html
@@ -54,10 +54,14 @@ function daystart(date){
 	return new Date(date.getFullYear(), date.getMonth(), date.getDate());
 }
 
+function shiftdays(date, off) {
+	var d = new Date(date);
+	d.setDate(d.getDate() + off);
+	return d;
+}
+
 function weekstart(date){
-	var d=daystart(date);
-	var wkday=(d.getDay()+6)%7;
-	return new Date(d - wkday*24*3600*1000);
+	return shiftdays(daystart(date), -(date.getDay() + 6) % 7);
 }
 
 var monthnames=["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];
@@ -199,7 +203,7 @@ function refreshcalendar(list,npreweeks){
 	var now = new Date();
 	var today = daystart(now), thismonday = weekstart(now);
 	for (var wkoff = -npreweeks; wkoff <= 1; wkoff++) {
-		var monday = new Date(thismonday.getTime() + wkoff*7*24*3600*1000);
+		var monday = shiftdays(thismonday, wkoff * 7);
 
 		tr = document.createElement("tr");
 		td = document.createElement("td");
@@ -211,7 +215,7 @@ function refreshcalendar(list,npreweeks){
 		tr.appendChild(td);
 
 		for (var i = 0; i < 7; i++) {
-			var day = new Date(thismonday.getTime() + (wkoff*7+i)*24*3600*1000);
+			var day = shiftdays(thismonday, wkoff * 7 + i);
 			var tm = hist.get(datekey(day)) || 0;
 			var descr = Math.round(tm/1000/3600*10)/10 + "h";
 			var target = (day.getDay()+6)%7 < 5 ? 38/5 - 1 : 0;