Question

Why does this:

startDate.setDate(startDate + 1);

Generates this strange order (broken at the beginning of the next month):

7, 27, 28, 30, 30, **1, 4, 3, 4, 4,** 6, 7, 10, 9, 10, 10, 12,

Update (more code):

renderWeekFromMonday : function(date) {
        var dayContainer = $('#day');

        // clear div
        dayContainer.empty();

        // Render days
        for (var i = 0; i <= 7; i++) {

            // Get mondday day (1-31)
            var day = date.getDate();

            // Today
            var t = new Date();

            // Create dayobject for usage inside for loop
            var d = new Date(date);

            // Render 7 days (1 week)
            for (var i = 0; i < 7; i++) {

                // New day (+1)
                d.setDate(day + i)
                console.info(d.getDate());

                // Create html
                var span = $("<span>").addClass("calElement").attr("time", d.getTime())
                var w = 25;
                span.html("<span class=dayNumber>" + d.getDate() + "</span><br>" + this.dayNames[d.getDay()]).css("width",w);
                //span.html("<span class=dayNumber>" + d.getDate() + "</span>");

                // Append day
                dayContainer.append(span);
            }
        }
    },

Answer 1

Just a guess, put perhaps you’re looking for:

startDate.setDate(startDate.getDate() + 1);

startDate + 1 doesn’t make much sense if startDate is a Date object.

---

After seeing updated code: Your problem is very likely in the fact that you have two nested loops, both of which increment i. Use a different variable for one of the loops.