Static stylized '1' on a slate (0xFF5C6B7A) background. The numeral references kalendae, the Latin word for 'first day of the month' that is the etymological root of both 'Calendar' and 'Calendula'. Adaptive icon spec: foreground vector path, monochrome variant for themed icons (API 33+), no PNG fallback needed (minSdk 29 > 26). Visual refinement is expected during the UI design iteration; this is the foundational shape and meaning. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>