Welcome! I would look into care.com, craigslist and facebook for advertizing. Do you have a website and FB page? That's a great way to have your friends share your sight for free exposure.
I offer a monthly date night ($20 4pm-8pm) and have had many parents considering my program use that as a trial run. It always seals the deal. I send them home with a cute craft, goody bag (usually extra supplies from last months theme - this last time it was a handful of plastic bugs) and I text the parents a few pics throughout the night of their kiddo having fun and feeling safe. Even if people aren't in need of regular daycare, if they come for a date night and are impressed they might spread the word.
Good luck! It takes time to fill. Hang in there
