It looks like you might be right on the 2Q dates. I can't really find a clear definition online though, and it seems to vary from company to company.

The Wikipedia dates are apparently for the US government's fiscal year, so Nokia's could easily be different.

This Register article (http://www.theregister.co.uk/2007/08...ia_q2_results/) supports what you are saying:
"The figures for the three months to 30 June show Nokia turning over €12.6bn, and making €2.36bn in profit." [in reference to 2Q 2007 earnings]

Too bad.

EDIT: According to this (http://cobrands.hoovers.com/global/c...tml?COID=41820) their fiscal year ends in December like the regular calendar, so 2Q would in fact be April - June.