From counting? The PR from Nintendo included the full weekend, Media Create/Famitsu numbers go through the 1st, VGC numbers go through the 1st.
29, 30, 31, 1. Four days.
The numbers on VG are according to the 31st. We don't know if that's the beginning of the day or the end of the day numbers so it's presumptuious to count the 31st. Either way, even if you do count the full of the 31st that still puts it at 3 days max, at least with VGC numbers.
Gotta figure out how to set these up lol.