What are the immigration office closures in April 2023 in Thailand?

In April 2023, Thai immigration offices will be closed on Thursday, April 6th for Chakri Memorial Day and from Thursday, April 13th to Monday, April 17th for Songkran. It is advised to avoid visiting offices on Tuesday, April 18th due to expected high traffic as many people will be seeking assistance following the closures. Additionally, airports and land borders will remain operational during this period. If a visa extension expires while the immigration is closed, individuals should visit the office as soon as it reopens to receive a stamp that waives any overstay fine due to the closure.