This question already has an answer here:
I am an American citizen living in Poland for 6 months.
I arrived in Poland on March 1, 2016 without a work visa (i.e, on a business trip).The count toward my Schengen days began.
I received my National Long-Stay Work Visa to legally work in Poland on April 7, 2016 at the consulate in Chicago and then returned to Poland on April 10th.
The work visa expires on July 7th. I intend to travel Europe until my scheduled departure on July 31.
My question is as follows: Because I entered the Schengen area on February 1, and received my entry tourist stamp - do I need to exit and reenter the Schengen area on July 7th in order to reestablish myself as a tourist in the Schengen area?
Or, am I allowed to remain in the Schengen area from July 7th until July 31st without exiting and reentering - since I already have my Schengen entry stamp from February 1?
Please note: The Schengen Borders Code states:
Periods of stay authorised 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.