In an RTL language, in what direction should calendar days go?

These are two alternative layouts of a calendar on a hebrew-language site. Hebrew is written from right to left. Should we display the dates in the same way that the language is written (RTL), or should we display the days of the week in the same way that dates are usually displayed (LTR)?

The problem is that the days of the week are given on the green bar at the top of the calendar, and reversing their order looks just as confusing to the native speaker, as reversing the order of the dates.