I’d really bad experience with the jQuery datepicker. The issue was that there mysteriously appeared two 26th of October and that resulted in shifting the days with one and it all appeared wrong. The Mondays became Tuesdays and so on.
The bug became clear after realizing that on 26th of October was when happened light saving changes. The function used in the datepicker was GMT related, the fix is when this function is substituted with simple date function with no GMT conversion.
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I was wandering where the problem was! very nice!
best whishes