Thank you Sherzod, This solution is not good for me   This code good for, just special date. What I need? I wanna chage backgroud color, if there is a any event in that date. I mean, on your screenshot, "31-10-2018", "01-11-2018", "02-11-2018" (from my code) If I'm not wrong,  secha add this div "x-calendar-weeks-overflow" If td has a event. For me, If this class added, then I wanna change this td's backgrouod colour. My problem is how to?   <tr class="x-calendar-w