Short-term visa now allows to stay in the Schengen countries for 90 days during the period of 180 days
Now you may stay in the Schengen zone on short-term visa for 90 days over a period of 180 days, compare to previous 90 days within 6 months, as per the new decree of the European Parliament.
Now on, days of stay in Schengen countries will be counted in a new way. On the European Commission's website you may find a special calculator which can calculate the length of stay so as not to violate the law.
It is noted separately that the calculation does not take into account the days spent in the EU countries that are non-Schengen (UK, Ireland, Bulgaria, Romania, Croatia and Cyprus).