I'll be travelling in Finland this summer, and today I've retrieved my passport back from VAC. The problem I have is that I applied for an effective starting date of June 16th for Finland, but I will set off from Shanghai China and land off at Frankfurt Germany on June 15th for transit. And a second flight from this very airport will take me to Finland and arrive on 16th.
A staff member at VAC Shanghai told me that there would be no problem as I am supposed to register my customs entry in Schengen area in Helsinki airport in Finland. But googling led me to believe that my passport control will be handled in Germany on 15th, and the subsequent flight to Finland will be treated as a domestic flight due to the nature of Schengen area. If that's the case, will my entry be denied because of the discrepancy of entry time?
Thank you everyone for your help so far. I wrote an email to the Consulate General of Finland in Shanghai last night, and a Finnish officer told me to bring my passport next Monday so that they can change the effective starting date to 15th for me. Unfortunately today they're temporarily closed due to Dragon Boat Festival in China. I hope this can be dealt with in a fast manner, or else things will go south.