FROM 18 OCTOBER, 2013 THE NEW RULES FOR CALCULATING SHORT STAYS OF THIRD-COUNTRY NATIONALS WITHIN THE SCHENGEN AREA COME INTO FORCE
As from 18 October 2013 for the vast majority of third-country nationals who intend to travel to the Schengen area for a short stay (contrary to reside in one of the Member States for longer than 3 months) the maximum duration of authorized stay is defined as "90 days in any 180-day period […]". "The date of entry shall be considered as the first day of stay on the territory of the Member States and the date of exit shall be considered as the last day of stay on the territory of the Member States. Periods of stay authorized under a residence permit or a long-stay visa shall not be taken into account in the calculation of the duration of stay on the territory of the Member States."
From 18 October 2013, administrative bodies and travellers will have access to a practical tool called the “short-stay calculator” allowing them to calculate the period of allowed stay under the new rules.
More detailed explanation and practical examples of calculation are available on the European Commission -Directorate General for Home Affairs'- website, under the following link: