Do these 6 controls represent 6 days?
I would like to extend the DayPilot Calendar so it can show more than one day vertically. That would probably help you.
Meanwhile, you can try to hack a workaround yourself: Put the header calendar in one div (divHeader) with overflow:hidden style. Put all the other calendars into another div (divBody) with overflow-x:scroll (and specify the width -- you may have troubles using 100% but try fixed width).
Hook divBody.onscroll and update the divHeader.scrollLeft according to divBody.scrollLeft;