When to Advertise Your Opening?

[Unregistered]

Hello,
I have been working the daycare center field for 5 years. I have decided to open my own daycare. However, I'm not sure when to start advertising that I'm opening a daycare. I don't plan to open until June as I want to have my license and some renovations are being done to the house. When would you suggest I start to advertise?

thanks for your help
MNM