# The busiest day at this dental practice is the day it's closed > One Ontario practice, 11 months of Xona call data. Friday — the weekday they're shut — gets 10.8 calls a day. Their busiest open day gets 4.5. Saturday and Sunday, also closed, get 2. Source: https://blog.xonark.com/blog/2026-07-15-the-busiest-day-is-the-day-youre-closed/ July 15, 2026 · Jack Jia · 5 min read - xona - dental - missed-calls - after-hours - production-data Ask a dental practice which day is quietest and you’ll get a confident answer. It’s usually the day they’re closed. Nothing is on the schedule, nobody is at the desk, the lights are off. Quiet. At one practice we have eleven months of call data for, the day they’re closed is the busiest day of the week. By a factor of two and a half. ## Who this is about Dr. Dan Hagi has been practising in Thornhill, Ontario for over twenty years. He graduated from the University of Toronto’s Faculty of Dentistry, took postgraduate implant training through the Misch International Implant Institute, and is an Associate Fellow of the American Academy of Implant Dentistry and a Fellow of the International Congress of Oral Implantologists. He has seven peer-reviewed papers to his name, published between 2004 and 2021. DH Smile Center Dentistry focuses on ceramic implants and minimally invasive aesthetic dentistry. It sees patients Monday through Thursday, and it has been running Xona on Oryx for eleven months. We are telling you all of this for one reason. What follows is not a story about a practice that was being run badly. It is the opposite. This is a twenty-year practice, led by a published implantologist, with modern cloud practice-management software and working online booking — and it was still losing hundreds of patient calls a year without anyone in the building knowing. That is the whole point. The leak isn’t incompetence. It’s invisibility. It catches good practices precisely because nothing in the building records it. Almost everything published about dental operations is either a vendor’s model or an anonymized composite with the interesting parts sanded off. This is one named practice and its own call data. Source: DH Smile Center Dentistry, Thornhill, Ontario — a general practice running Xona on Oryx. All inbound calls from 19 August 2025 to 14 July 2026, timestamped in America/Toronto and compared against the clinic’s own configured opening hours, which are listed publicly on their own website. ## What the week actually looks like The practice is open Monday to Thursday and closed Friday, Saturday and Sunday. - Friday — closed — 10.8 calls a day. - Monday — open — 4.5. - Tuesday, Wednesday, Thursday — open — 2.2 to 2.6. - Saturday and Sunday — closed — 2.3 and 2.0. Friday is 2.4× their busiest open day and roughly 4× a typical open day. Over eleven months that’s 433 calls arriving at a locked door. ## The part that makes it interesting If the story were simply “phones ring when you’re closed,” the weekend would look like Friday. It doesn’t. Saturday and Sunday are the two quietest days on the board. The difference isn’t that the clinic is closed. It’s that Friday is a weekday. Patients live on a weekday rhythm. They call on their lunch break, between meetings, while the kid is at school, when the tooth started hurting at breakfast and it’s now a workday problem. That rhythm doesn’t check your hours. If you are closed on a Tuesday, Tuesday’s demand still arrives on Tuesday. Weekend closures are cheap, because nobody was calling anyway. A closed weekday is expensive, because everybody is. ## Being honest about what a “call” is We answer every inbound call at this practice, which means “433 calls” includes wrong numbers, robocalls and hang-ups. Anyone quoting a raw call count at you and calling it demand is selling something. So, the stricter cut: of those 433 Friday calls, 326 ran thirty seconds or longer , and they came from 225 unique phone numbers. Even if you throw away every short call as noise, this is still hundreds of separate people, on the day the door is locked. Across the whole eleven months, 893 of the practice’s 922 calls arrived while the clinic was closed — and 209 appointments were booked out of the total. ## Why nobody sees this A missed call leaves almost no evidence. There’s no empty chair to look at, no gap in the schedule, no line item that says patient tried, gave up, called someone else. The practice management software has no idea it happened, because it never happened in the software. The front desk knows about the calls it answered. Nobody, anywhere, is counting the ones that arrived at a closed door on a Friday afternoon. That is why the intuition — “Friday is quiet” — survives. It isn’t a bad guess. It’s an unfalsifiable one, until someone puts a counter on the line. ## What to do with this Four-day weeks are common in dentistry, and there is nothing wrong with them. The demand doesn’t disappear because the practice is closed; it just goes somewhere it can be measured. If you close on a weekday, the useful thing you can do this month is find out what arrives on it. You don’t need us for that — you need any counter on the line that logs a call nobody picked up. Then decide whether the number bothers you. For this practice it was 433 calls, and it was invisible until it wasn’t. Dr. Dan Hagi runs DH Smile Center Dentistry in Thornhill, Ontario, on Oryx. He talks about what changed, in his own words, on [xonark.com](https://xonark.com/xona-lps/#customer-evidence). [← All posts](/)