Windstorm damaged Stupa repair underway

There's probably some reasonable explanation to my questions.
Why they stood around all day in discussions and poses and did the job in the cover of darkness.

• Possibly it's of some Buddhist significance? I remember the house blessing, the first pillar was erected at a precise time
• Or possibly they had to wait for the dignitaries to arrive

Video posted byDJM sutiporn Sakonnakhon