I just received email from TK that my flight is re-time.

Original flight
TK 69 BKK 23:30 IST 05:20+
TK 17 IST 14:00 YYZ 18:15

New flight
TK 69 BKK 23:30 IST 06:20+
TK 17 IST 15:00 YYZ 18:15

Not really sure what is the reason behind re-time, it seems to me like TK forget to factor in the timezone adjustment?

Since I need to be there from 06:20 to 15:00 instead of 05:20 to 14:00, is it possible that I join the free tour? The website show it should be 09:00 to 15:00. Is there anyway that I can come back earlier (skip lunch perhaps).

Well the time to layover is still the same (8h40) but shift by an hour. I think with the immigration procedure and I need to be back to airport about 1 hour before the flight, I guess I still have 5-6 hours.

If I cannot join the tour, is there any other things that I can do rather than just stuck at the lounge for 8 hours?