Doing baby Full mth or 100 days?

100 days is the tradition in northern Asia e.g. Japan, North China. Similar to 满月 full month which is the tradition in Singapore and more south asian countries. No right or wrong, it is just an occasion into celebrate baby's birth. I did a hybrid and celebrated at 6 weeks after birth. Why? Coz baby would have had his first vaccination at 4 weeks, another week or so to ensure baby is ok from the vaccination e.g. no fever etc.