Activity map

The grid of days by weeks, like the one on a GitHub profile: each column is a week (Monday to Sunday), each square a day, and the color shows how much activity there was. At the top, the title and the total for the period, and above the columns the name of each month in the week where it starts. If the period does not start on a Monday, the first column has gaps for the days before: it is the same week, not a misalignment.

When to use it

• To see at a glance which days have the most activity over a few months: orders, workshop check-ins, reviews.
• from and to mark the period, both included; days without data count as zero, not as a gap. They are calendar days, without a time: the clock change in March and October neither repeats nor drops any of them.
• label says what is measured and unit what each count is of ("orders").
• tableVisible shows the table of days with their counts below, when the exact number matters.
• The color is spread over four levels on the real maximum of the period: if the best day is four orders, four is the ceiling.

When not to

• To compare quantities across a few categories: BarChart.
• For the evolution of a figure, with its rise or fall: Trend.
• For appointments and events in a month that can be opened: MonthAgenda.

Keyboard: none: there is nothing to press.

Accessibility: the grid is a real table, with the title in the caption and the day of the week as the header of each row. Each square carries, hidden from view, its full date and its count ("Monday, September 14, 2026: 3 orders"): a colored square cannot be read aloud and cannot be told apart if the colors are hard to see. The "Less … More" legend is decorative. With tableVisible, the table of days is the data for everyone and the grid becomes the drawing (aria-hidden), so the reader does not announce it twice. If from comes after to, it says so ("No dates to show") instead of drawing an empty grid.

Fine-tuning: CSS variables --amset-activity-*: -cell, -day, -label, -radius, -slot, -title. The size moves the side of the square, the gap between squares and the labels.