Are immigration offices in Thailand open on Monday, February 5th for visa extensions?

You can go anytime I do not advise waiting until the last day

Go this week, don't wait until the last day

Immigration offices are open on 5th February. But you don't have to wait until the last day of your stamp as a tourism extension will be added to your stamp (like top up) even if you apply for it days in advance.

You are going to go to IT Square Laksi Plaza temporary office, just next to Lak Si station of SRT Dark Red Line.

You will go here.



And you may book online here