Datepicker UI has two days with the same number for November.

[jeberly]

Go to datepicker for 2008 and notice two Nov 2nd's.

[hunterheitzm]

also displays numbers incorrectly for November 2007 if you go a year back.

[jehinkle]

The problem is daylight savings time. The Date object on line 172 sets the year,month and day, but with no time specified defaults to midnight. So when the time increments by 1 day, and then daylight savings sets it back 1 hour, you get two November 2 on the calendar. Include a time greater than 1 when the date object is created and problem is solved.

Change line 1272 in ui.datepicker.js or line 5801 in jquery.ui.all.js from: var printDate = new Date(drawYear, drawMonth, 1 - leadDays); to: var printDate = new Date(drawYear, drawMonth, 1 - leadDays,12);

[flesler]

This belongs to the ​UI Bug Tracker.