diff --git a/src/Model/Files/boardsAndTasksModel.ts b/src/Model/Files/boardsAndTasksModel.ts
index f92db82d..85feae48 100644
--- a/src/Model/Files/boardsAndTasksModel.ts
+++ b/src/Model/Files/boardsAndTasksModel.ts
@@ -1,4 +1,4 @@
-// thile file is responsible for managing boards within chats and tasks within boards.
+// this file is responsible for managing boards within chats and tasks within boards.
 
 import {
   DATA_VERSION,
diff --git a/src/Model/Files/calendarModel.ts b/src/Model/Files/calendarModel.ts
new file mode 100644
index 00000000..a4428a7a
--- /dev/null
+++ b/src/Model/Files/calendarModel.ts
@@ -0,0 +1,83 @@
+// this file extends the BoardsAndTasksModel regarding calendar features.
+// it is responsible for managing calendar-realted reference files for tasks.
+
+import BoardsAndTasksModel, {
+  TaskFileContent,
+  TaskFileContentReference,
+} from "./boardsAndTasksModel";
+import FileModel, { FileContent, FileModelSubPath } from "./fileModel";
+
+import StorageModel from "../Global/storageModel";
+import { checkMatchesObjectStructure } from "../Utility/typeSafety";
+
+export default class CalendarModel {
+  storageModel: StorageModel;
+  fileModel: FileModel;
+
+  boardsAndTasksModel: BoardsAndTasksModel;
+
+  // paths
+  getBasePath = (): string[] => {
+    return this.fileModel.getModelContainerPath(FileModelSubPath.ModelCalendar);
+  };
+
+  getViewPath = (): string[] => {
+    return [...this.getBasePath(), FileModelSubPath.ModelView];
+  };
+
+  getMonthContainerPath = (): string[] => {
+    return [...this.getBasePath(), CalendarModelSubPaths.Months];
+  };
+
+  getMonthPath = (monthString: string): string[] => {
+    return [...this.getMonthContainerPath(), monthString];
+  };
+
+  // handlers
+  handleFileContent = (fileContent: FileContent<string>): void => {
+    if (
+      checkMatchesObjectStructure(fileContent, TaskFileContentReference) ==
+      false
+    )
+      return;
+  };
+
+  // main
+  storeTaskReference = (taskFileContent: TaskFileContent): void => {
+    if (taskFileContent.date == undefined) return;
+    const monthString: string = CalendarModel.isoToMonthString(
+      taskFileContent.date
+    );
+
+    const monthPath: string[] = this.getMonthPath(monthString);
+    const referencePath: string[] = [...monthPath, taskFileContent.fileId];
+
+    this.storageModel.write(referencePath, "");
+  };
+
+  listTaskIds = (monthString: string): string[] => {
+    const monthPath: string[] = this.getMonthPath(monthString);
+    return this.storageModel.list(monthPath);
+  };
+
+  // init
+  constructor(
+    storageModel: StorageModel,
+    fileModel: FileModel,
+    boardsAndTasksModel: BoardsAndTasksModel
+  ) {
+    this.storageModel = storageModel;
+    this.fileModel = fileModel;
+    this.boardsAndTasksModel = boardsAndTasksModel;
+  }
+
+  // utility
+  static isoToMonthString = (dateISOString: string): string => {
+    const [year, month, _] = dateISOString.split("-");
+    return `${year}-${month}`;
+  };
+}
+
+export enum CalendarModelSubPaths {
+  Months = "months",
+}
diff --git a/src/Model/Files/fileModel.ts b/src/Model/Files/fileModel.ts
index 31f7e89a..6075543b 100644
--- a/src/Model/Files/fileModel.ts
+++ b/src/Model/Files/fileModel.ts
@@ -173,6 +173,7 @@ export enum FileModelSubPath {
   Model = "model",
   ModelView = "view",
   ModelTask = "tasks",
+  ModelCalendar = "calendar",
 };
 
 // types