We leave in the first year (from date - month - year started. Day - month - year Next, collision calendar holidays will be as follows. Calculated using the following formula.
Vacation in the first year (from day month year started, until the day month year. Next to collide calendar will be a vacation as follows: using formulae as follows.
Summer vacation in the first year (year-month-day counting from the start date until next year-month-collision, according to the calendar will be a relaxing holiday as follows, using the formula: