When do I post the registry?

So I’m due February 25, 2021, and this is my first baby. My SIL is helping plan my baby shower and we decided it would be more difficult to have a baby shower in the Minnesota winter when some family would have to travel and we didn’t want it to be a huge event thing, so we ended up planning it for November. When should I post my registry? I’ve been working on it since I found out I was pregnant at 6 weeks but I don’t know when is the “right” time to post it.