Shift of a cycle

[Igorek]

It seems to me, a question wash it is most actual in the summer... The matter is that many as well as have decided to have a rest in the summer, but time of rest has coincided to the day with time monthly how to be, in fact so it would not be desirable to stay all the days long in hotel, and to not be expiated at all... And so how it is possible to displace a cycle for a week forward or on the contrary, a week later?