Gunter, use caution if your trying to use June Vacation in September. I learned this lesson painfully not long ago trying to do just that. In your later vacation month, you will need to slide/expand vacation to conflict with a high CH value trip, otherwise you'll be limited to 6CH beyond THAT month's vacation credit when expanding your vacation. If this turns out to be your last vacation of the year, you will make a hefty donation to some management MBO super fund, like I did.

Good luck.