Scroll down to hours of opertion and input the date range you want and it'll provide hours of operation.
http://www.nuerburgring.de/North-loop.361.0.html
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'08 Carrera S 6MT Guards Red/Black ext leather, Carbon fiber pkg, sport exh, sport chrono +, PASM, Nav, Bose, 19" forged turbos, red tranny tunnel
'07 MV Agusta F4 1000 R 1+1, Corse Red/Silver, RG3 race pipes and factory race ECU