diff --git a/etc/psa_tariff/tariff05.json b/etc/psa_tariff/tariff05.json
index dfd84b1..b86e3a9 100644
--- a/etc/psa_tariff/tariff05.json
+++ b/etc/psa_tariff/tariff05.json
@@ -316,16 +316,16 @@
     {
       "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
     },
     {
       "ped_id": 16,
       "ped_label": "Labour Day",
-      "ped_date_start": "2026-05-02",
-      "ped_date_end": "2026-05-02",
+      "ped_date_start": "",
+      "ped_date_end": "",
       "ped_period_special_day_id": 2,
       "ped_year": 0
     },
@@ -348,16 +348,16 @@
     {
       "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
     },
@@ -372,8 +372,8 @@
     {
       "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
     }