diff --git a/src/services/TaskService.ts b/src/services/TaskService.ts
index 533b325c2..ef36ff494 100644
--- a/src/services/TaskService.ts
+++ b/src/services/TaskService.ts
@@ -204,7 +204,10 @@ export class TaskService {
 	}
 
 	private getCompletionDateForTask(task: TaskInfo): string {
-		return task.occurrence_date || getCurrentDateString();
+		// Record the real completion date, matching non-recurring task behavior.
+		// Which occurrence was fulfilled is tracked separately on the parent's
+		// complete_instances (see buildMaterializedOccurrenceCompletePlan). #2125
+		return getCurrentDateString();
 	}
 
 	/**
diff --git a/tests/unit/services/task-occurrence-materialization.test.ts b/tests/unit/services/task-occurrence-materialization.test.ts
index 36010db8c..31ece205c 100644
--- a/tests/unit/services/task-occurrence-materialization.test.ts
+++ b/tests/unit/services/task-occurrence-materialization.test.ts
@@ -437,9 +437,12 @@ describe("TaskService materialized occurrences", () => {
 
 		await taskService.updateProperty(occurrence, "status", "done");
 
+		// completedDate records when the user actually completed the occurrence
+		// (the mocked "today", 2025-01-01), while the parent's complete_instances
+		// keeps tracking WHICH occurrence was fulfilled (the occurrence date).
 		expect(frontmatterByPath.get(occurrence.path)).toMatchObject({
 			status: "done",
-			completedDate: "2026-06-01",
+			completedDate: "2025-01-01",
 		});
 		expect(frontmatterByPath.get(parent.path)).toMatchObject({
 			complete_instances: ["2026-06-01"],