Extension of 30 day stamp
On Feb 21st my visa expires. Is it ok to go to immigration on the same day, Feb 21st, to extend for another 30 days?
Samui immigration.
TLDR : Answer Summary
Yes, you can apply for a 30-day extension on the expiration date of your visa, which is February 21st in your case. You can visit Samui immigration on that day to extend your stay without losing any days.