Calendar design examples

What are the core design principles for calendar UI that actually works?

Calendar design is dense UI — it must display a large amount of structured temporal data at high information density without becoming cognitively overwhelming. The best calendar interfaces solve this through layers: a compressed monthly overview for navigation context, a detailed week or day view for active planning, and clear visual differentiation between today, selected dates, and event-occupied days. The fundamental tension in calendar design is between information completeness and visual clarity.

How should event density and overflow be handled in calendar grids?

Calendar grids overflow when more events exist than visible rows allow. The standard approach shows 2–3 events with a "+N more" overflow indicator — clicking it reveals a popover or expands the cell. Event styling should communicate category, duration, and status through color, length (in week views), and optional icons. In high-density calendars, color coding by category is essential — but must be backed by pattern or icon differentiation for color-blind users.

How do mobile calendar designs differ from desktop?

Mobile calendar design typically favors agenda view (chronological list) over grid view as the primary mode — grids become too small to be actionable below 360px width. Month view works as a compact navigation element at the top with the agenda list below a divider. Date selection patterns differ too: on mobile, a bottom sheet for date picking outperforms modal dialogs, and swipe gestures for month navigation are universally expected.