a broken halo / recorded rest
Each elliptical contour keeps one recorded sleep window, previous noon to noon on its labelled date. Earlier observed dates sit inside, later dates outside. Radius follows observed-date order, not elapsed calendar time. A gently shifting center gives the halo its shape. Blue and yellow alternate to separate adjacent contours; red marks the selected one. These colors do not label states.
Noon starts at the top of each contour. Time advances clockwise, once around its full elapsed window. A five-minute cell is drawn when its midpoint falls inside a retained asleep interval. Daylight-saving windows contain 23 or 25 elapsed hours. The silhouette rounds interval edges; short intervals can disappear and short breaks can close. Raw interval endpoints are not published.
Open arcs mean no retained asleep observation there, not verified wakefulness. Separate visible runs are not a count of awakenings. Missing windows add no contour. This preserves recorded structure without assigning sleep quality, mood or an episode. The exact reader retains the original recorded-hours total and separately reports the rounded silhouette total; they can differ.
Source filters keep all original positions. The sleep source was selected by archive coverage priority, with fallback only when the preferred source had no recorded asleep interval in that window. Sources are not added together. Recording changes may reflect a different device.
Click near a contour to select it. Focus the artwork and use left/right chronologically, Home/End for the first/last, or Enter to open this reader. The date control selects the nearest available recorded window.
All forms · Collection method