diff --git a/src/types.ts b/src/types.ts
new file mode 100644
index 0000000..7b484f9
--- /dev/null
+++ b/src/types.ts
@@ -0,0 +1,15 @@
+export enum Scale {
+  Day = "D",
+  Week = "W",
+  Month = "M",
+}
+
+export interface Event {
+  date: Date;
+  title: string;
+  text?: string;
+  icon?: string;
+  bgColor?: string;
+}
+
+export type Groups = Event[][];