Skip to main content
FLAGSHIPOn AppSource

Zentrix Calendar Heatmap

See a year of your data at a glance — and what it's telling you.

A GitHub-style full-year calendar heatmap for Power BI. Plot any daily measure across a 53-week grid, spot weekday rhythm and seasonal patterns instantly, and let the built-in insight engine surface streaks, anomalies, and year-over-year shifts — all computed entirely inside the Power BI sandbox.

Get it on AppSourceRead the field guide
FreeNo sign-inRuns in-sandbox
The Zentrix Calendar Heatmap running in Power BI
The shipping visual, running on real data.

Features

Built to surface
what matters

Full-year calendar grid

A familiar GitHub-style heatmap maps every day of the year onto a compact 53-week grid, so a year of activity reads in a single glance — no scrolling, no axis hunting.

Weekday & seasonal rhythm

Color encodes intensity by day. Weekday patterns, weekend dips, and seasonal swings jump out immediately — the kind of cadence a bar chart hides.

Streaks & momentum

The insight engine detects active streaks and the longest run in the period, so consistency and momentum are surfaced automatically, not eyeballed.

Conditional formatting & palettes

Choose from sequential and diverging palettes, set thresholds, and match your report theme. Accessible color steps keep the grid readable for everyone.

Screenshots

The real thing,
not a mock-up

Every image below is a capture of the shipping Calendar Heatmap. Where a shot needs a paid plan, its caption says so.

Calendar Heatmap — Two years of daily volume in one grid, with the insight engine calling out the peak day, a 26-day streak and 139 unusual days. The hover card carries the value, the day-over-day delta and the variance against target.
Two years of daily volume in one grid, with the insight engine calling out the peak day, a 26-day streak and 139 unusual days. The hover card carries the value, the day-over-day delta and the variance against target.
Calendar Heatmap — The same data on a linear and a quantile scale. Linear lets one spike compress everything else into the pale end; quantile spreads the distribution across all five buckets so every week still reads.
The same data on a linear and a quantile scale. Linear lets one spike compress everything else into the pale end; quantile spreads the distribution across all five buckets so every week still reads.
Calendar Heatmap — Click a day or drag across a range to cross-filter the rest of the report, with the selection reflected back on the grid.
Click a day or drag across a range to cross-filter the rest of the report, with the selection reflected back on the grid.
Calendar Heatmap — Month-block layout with full keyboard navigation and ARIA on every day, beside the dark theme with a colourblind-safe ramp — where the threshold is marked by a hatch, not by hue alone.
Month-block layout with full keyboard navigation and ARIA on every day, beside the dark theme with a colourblind-safe ramp — where the threshold is marked by a hatch, not by hue alone.

Learn it, then try it

Know every setting
before you open Power BI

The Field Guide

Every setting explained in plain English — why it exists, when to reach for it, and what to expect when you flip it. Layouts, fiscal years, small multiples, color scaling, badges, accessibility, plus an FAQ.

Read the guide

The Playground

The visual's full settings tree wired to a live simulation. Change layouts, palettes, badge rules and tile sizes and watch the calendar respond — before you ever open Power BI.

Open the playground

The Insight Engine

Insights that never
leave your tenant

The Calendar Heatmap computes its insights with transparent, deterministic logic — entirely inside the Power BI sandbox. No external calls, no telemetry, nothing leaves your tenant.

  • Active and longest streaks
  • Weekday rhythm (which days run hot or cold)
  • Anomalies — days that break the pattern
  • Year-over-year shifts

Runs in the Power BI sandbox

Every insight is computed inside the Power BI visual sandbox. The visual makes no external network calls and sends no telemetry — nothing about your data leaves your tenant.

Deterministic insights

No AI guesswork. Streaks, weekday rhythm, anomalies, and year-over-year are computed with transparent, repeatable logic — the same data always yields the same result.

Insight engine, built in

The heatmap doesn't just plot — it reads the pattern for you, surfacing what changed and what's worth a second look, right on the canvas.

Free to use

Free, fast to install, and yours to keep

The core Calendar Heatmap is free — no trial, no watermark, no sign-in. Add it from AppSource, drop it on your canvas, and you're running. Full setup steps live in the docs.

Get it on AppSourceRead the field guide
Read the Calendar Heatmap field guide

Free, and staying free. If the Calendar Heatmap earned its place on your report, you can support the work:

Support me on Ko-fi