# Heatmap Calendar Tide

> A calendar heatmap laid out like a tide table, one column per week and seven rows for weekdays, where activity depth is shown with a single-hue color ramp and the grid is fully keyboard-navigable.

- Author: [nikolas-sapa](https://21st.dev/@nikolas-sapa)
- Library: @ns-ui
- License: MIT
- Tags: Calendar, Chart, Heatmap, Data Viz
- Live preview: https://21st.dev/@nikolas-sapa/components/heatmap-calendar-tide

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/nikolas-sapa/heatmap-calendar-tide?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/calendar.md