Ability to schedule vacation weeks in advance

Currently Join allows me to set availability only for a few days in advance. However, this means that holiday periods (e.g. 1-2 weeks off the bike) cannot be taken into account for periodisation.

For example, I recently started a training plan 4 weeks before my vacation, and I was still slowly building up fatigue in the training block when I went on vacation. I’d expect that if I can enter the vacation days in advance, join can create a shorter training block so that the vacation overlaps with the recovery week.