On 18 October 2013 new rules
for calculating the length of a short-term stay in the Schengen area came into effect.
The change applies mainly to third country nationals residing in the territory of the Slovak Republic based on a visa or within the visa free regime or based on a valid residence permit issued by another Member State. Such residence of third country nationals shall be considered authorised for a maximum period of 90 days within any 180-day period.
When calculating the length of the authorised stay, a 180-day period preceding every individual day of the stay
is being considered. Thus the 180-day reference period is "moving" and is considered backwards not only with regard to the date of first entry into the Schengen area, but also with regard to any other day of the stay.
In practice, the introduction of new rules for example means that staying outside the Schengen area for a period of 90 consecutive days allows for a new stay of up to 90 days.
To calculate the length of your authorized stay in the Schengen area, it is necessary to use the Schengen Visa Calculator that is available here
. A manual for the visa calculator may be downloaded on the website of the European Commission
New rules were introduced by Regulation No. 610/2013 of the European Parliament and of the Council, which entered into force on 19 July 2013.