diff --git a/assets/src/types.ts b/assets/src/types.ts
index 254b3b9..bbd73a8 100644
--- a/assets/src/types.ts
+++ b/assets/src/types.ts
@@ -12,6 +12,29 @@ export interface HeatmapData {
   };
 }
 
+export interface HourEntry {
+  hour: number;   // 0-23
+  hours: number;
+  count: number;
+}
+
+export interface DayHourEntry {
+  day: number;    // 0-6, relative to weekStart
+  hour: number;   // 0-23
+  hours: number;
+  count: number;
+}
+
+export interface HourlyData {
+  hours: HourEntry[];
+  range: { begin: string; end: string };
+}
+
+export interface DayHourData {
+  matrix: DayHourEntry[];
+  range: { begin: string; end: string };
+}
+
 export interface HeatmapConfig {
   cellSize: number;
   cellGap: number;