do I need to leave Schengen zone when half year is finished even I didn't exhaust 90 days limit or not?
Following the amendment of the
Schengen Border Code No. 610/2013 of June 26, 2013, the reference period of 180 days within which a foreigner can spend up to 90 days in the Schengen area will be looked at backwards from
each day of the stay (i.e. the calculation of stay will be done within 180 days preceding each day of stay). An applicant is entitled to apply for the visa for up to 90 days within any 180 days. The application is processed in regards to the previous stays in the Schengen area.
On the website of the European Commission can be found the
Schengen visa calculator allowing you to calculate the period of allowed stay under the new rules (based on the input of the information on the date of entry and dates of previous stays).
http://ec.europa.eu/dgs/home-affairs/what-we-do/policies/borders-and-visas/border-crossing/index_en.htmclic on the link „short-stay calculator“