Can you show me where my words hurt you? I googled highest all time temp in Thailand and that's what came back. You are welcome to believe it or dismiss it.
I could be mistaken but I seem to remember that whenever I have arrived at immigration after midnight(which is often) I still get stamped for the day before. It doesn't seem to change at 12:01
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.