diff --git a/docs/IMPLEMENTATION_PLAN.md b/docs/IMPLEMENTATION_PLAN.md
index 1b1bf6a..194630f 100644
--- a/docs/IMPLEMENTATION_PLAN.md
+++ b/docs/IMPLEMENTATION_PLAN.md
@@ -341,7 +341,7 @@ NavMenu.razor:
 | ✓ | D2 | Personen | Person Pages | 1 Razor |
 | ✓ | D3 | Expenses | ExpenseState Fluxor | 4 State-Dateien |
 | ✓ | D4 | Expenses | Expense Pages | 1 Razor |
-| ☐ | E1 | Days | DayState Fluxor | 4 State-Dateien |
+| ✓ | E1 | Days | DayState Fluxor | 4 State-Dateien |
 | ☐ | E2 | Days | Days List Page | 1 Razor |
 | ☐ | E3 | Days | Day Details Page | 1 Razor |
 | ☐ | E4 | Days | PersonExpense Management | Components in DayDetails |