I take 2 weeks in the summer and then a handful of days for appointments if needed because they are out of town specialists.

I've been open 5 years. I may increase it to 3 weeks next year. I don't have a set amount of time in my contract but let parents know the above info.

As long as you can afford it, give plenty of notice and don't think you'd lose clients over it, I'd say take whatever you want. Anything over 2-3 weeks I'd state in my contract though. Many parents get the standard 2 week holidays but if you're taking 4+ weeks off they should know upfront as some may have to choose another hdc if they can't find alternate care for that time.