Calendar.md

@@ -13,7 +13,7 @@ Here is a tentative calendar for the lectures at ULiège:
 | 28/03     | 💻 group work with instructors                                 |
 | **29/03** | 📓 **Progress report #2 - Scalar DG solvers**                  |
 | 31/03     | 🏭 Company visit: [A6K Charleroi](https://www.a6k.be/) ([Cenaero](https://www.cenaero.be/))                        |
-| *04/04*   | ⛱️ *NO CLASS ("PAQUES")*                                       |
+| *04/04*   | 💻 group work with instructors                                 |
 | *11/04*   | ⛱️ *NO CLASS ("PAQUES")*                                       |
 | 18/04     | 💻 group work with instructors                                 |
 | 25/04     | 💻 group work with instructors                                 |