Ahead of Shedule feature

Hi! As I have read, for the best results I should use Mnemosyne every day, and even one or two days of non-using may degrade the algorithm's performance. But you see, I will have to go for a week-long trip, and I'm not much enthusiastic about taking my laptop with me. The program has "Learn ahead of shedule" button... What is it for? Can I use it to study for 7 days ahead and then leave for my trip without laptop, knowing that even if I won't be using the program for 7 days its algorithm will still work properly when I return and get back to my studies? Or maybe I can trick the algorithm somehow by changing date on my computer? And what do the 7 days of non-use really mean, what effect will they have on the algorithm and how bad this effect is going to be? Thanks!