diff --git a/PKHeX.Core/Legality/Encounters/Data/Live/EncounterServerDate.cs b/PKHeX.Core/Legality/Encounters/Data/Live/EncounterServerDate.cs
index 8f1c67597..21170fa0f 100644
--- a/PKHeX.Core/Legality/Encounters/Data/Live/EncounterServerDate.cs
+++ b/PKHeX.Core/Legality/Encounters/Data/Live/EncounterServerDate.cs
@@ -107,5 +107,6 @@ public static bool IsValidDateWC9(WC9 card  , DateOnly obtained) => (WC9Gifts.Tr
     {
         {0001, (new(2022, 11, 17), Never)}, // PokéCenter Flabébé
         {0006, (new(2022, 12, 16), new(2023, 02, 01))}, // Jump Festa Gyarados
+        {0501, (new(2022, 02, 17), new(2023, 02, 21))}, // Jiseok's Garganacl
     };
 }