100days celeb or full month?

Hello mummies do u celeb 100 days or full month? I mean nowadays younger generations don’t celeb full month anymore right? My stance is at least 100 days bb will have a stronger immune system. What’s your view on this? Well, mil side Wan to do full month. Which I think it’s kind of not very appropriate given 1)baby’s immune system 2)current covid measures and the virus outside.