Is the immigration office open tomorrow in Thailand?

Just called the office to confirm and it's open as usual. There's the HM The King ceremony tomorrow thus I think people will be asking.

As a rule, I've found people on 30 day visa exempt stamps and even people on 60 day tourist visa stamps don't seem to get out there all that early.

Extensions of stays cost 1900baht..

If you go downstairs there are copy shops that will fill out the correct form for you, make your copies and even take your picture if you forgot one.

I'd say get there by 9:15-9:30 and you'll be out in under 45 mintues

I think it is, I didn't see any holidays for June listed..