when to post about a relationship

so I've only been dating this new guy for a little over a month now and he has made it official but idk if I should go ahead and put it on my Facebook or wait a little longer to. I want to put it on bc I will get random guys messaging me trying to hit on me which I shoot them down but it's just annoying. I have one guy who is pretty much talking to himself on messenger and I've told him I have a boyfriend anyway I guess I'm asking how long do you usually wait to post it on social media? I was thinking after 12 weeks but now I'm kinda wanting to now. I'm undecided I guess now