Originally Posted by
warakorn
Most likely, AY contract staff in India will deny the passenger boarding.
Yes. India cannot know the Schengen / Non-schengen procedures at HEL, so denied boarding is the most probable result.
However, if you manage to board, hanging out in non-schengen until visa becomes valid is completely possible. You just exit the safety check and hang out in the area before passport control.
Passport control is open till late, HKG flight leaves @ 23.40. Non-schengen lounge is open till 00.00, so at least exit to land-side will be possible.