Is the Mae Sai Border Closed During Holidays?

Is Mae Sai boarder closed during the upcoming days?

Due to the great help from this group I decided to give up flying and crossing the Mae Sai boarder instead.

I Want to go on Monday but in the clipped message on the group it says that all Thai immigration closed Monday. Does it apply to the boarder offices as well?

And what about Sunday? I know it's a holiday here.

Also, if you have recommendations to the best hours to schedule the green bus, I would be happy to hear.

Thank you very very much