Kingston's collection week has three moving parts, and getting any of them wrong costs you two weeks. Garbage and the green bin go out weekly. The blue box and the grey box alternate, so which one is due depends on the week, not the day. A statutory holiday pushes the rest of that week a day later. And roughly every fourth week, a second untagged bag is taken.
This reads the City's own waste calendar for the address you type — the same schedule behind the Kingston Waste App, with the holiday shifts already applied. It shows the dates as the City publishes them; it does not compute any of them.