@Armin_Tamzarian, in general, this issue in many trading platforms is solved using an external "holidays" file that contains references to market future holidays (this kind of lists could be imported in AB as an extra ticker using the Date field to store dates and the other fields for other purposes).
Something similar was discussed here:
(be sure to read the @Tomasz comment) and here:
Probably the quickest (dirty) fix for now is to add a condition to your rotation "day" rule with an OR like: (to adjust as needed)
rotation = yourEndOfMonthRule OR DateNum() == 1240328; // adding more dates for other next occasions