diff --git a/etc/psa_tariff/tariff06.json b/etc/psa_tariff/tariff06.json
index 986fe77..4ea7360 100644
--- a/etc/psa_tariff/tariff06.json
+++ b/etc/psa_tariff/tariff06.json
@@ -913,8 +913,8 @@
     {
       "ped_id": 15,
       "ped_label": "Christmas 2nd day",
-      "ped_date_start": "2026-12-26",
-      "ped_date_end": "2026-12-26",
+      "ped_date_start": "",
+      "ped_date_end": "",
       "ped_period_special_day_id": 2,
       "ped_year": 0
     },
@@ -945,16 +945,16 @@
     {
       "ped_id": 19,
       "ped_label": "Christmas 1st day",
-      "ped_date_start": "2025-12-25",
-      "ped_date_end": "2025-12-25",
+      "ped_date_start": "",
+      "ped_date_end": "",
       "ped_period_special_day_id": 2,
       "ped_year": 0
     },
     {
       "ped_id": 20,
       "ped_label": "Christmas 2nd day",
-      "ped_date_start": "2025-12-26",
-      "ped_date_end": "2025-12-26",
+      "ped_date_start": "",
+      "ped_date_end": "",
       "ped_period_special_day_id": 2,
       "ped_year": 0
     },
@@ -969,8 +969,8 @@
     {
       "ped_id": 22,
       "ped_label": "Christmas",
-      "ped_date_start": "2025-12-24",
-      "ped_date_end": "2025-12-24",
+      "ped_date_start": "",
+      "ped_date_end": "",
       "ped_period_special_day_id": 2,
       "ped_year": 0
     },