diff --git a/src/data/egg.ts b/src/data/egg.ts
index f0d6de26a..41216f27e 100644
--- a/src/data/egg.ts
+++ b/src/data/egg.ts
@@ -95,9 +95,16 @@ export function getLegendaryGachaSpeciesForTimestamp(scene: BattleScene, timesta
 
   let ret: Species;
 
+  // 86400000 is the number of miliseconds in one day
+  const timeDate = new Date(timestamp);
+  const dayDate = new Date(Date.UTC(timeDate.getUTCFullYear(), timeDate.getUTCMonth(), timeDate.getUTCDate()));
+  const dayTimestamp = timeDate.getTime(); // Timestamp of current week
+  const offset = Math.floor(Math.floor(dayTimestamp / 86400000) / legendarySpecies.length); // Cycle number
+  const index = Math.floor(dayTimestamp / 86400000) % legendarySpecies.length // Index within cycle
+
   scene.executeWithSeedOffset(() => {
-    ret = Utils.randSeedItem(legendarySpecies);
-  }, Utils.getSunday(new Date(timestamp)).getTime(), EGG_SEED.toString());
+    ret = Phaser.Math.RND.shuffle(legendarySpecies)[index];
+  }, offset, EGG_SEED.toString());
 
   return ret;
 }
\ No newline at end of file
diff --git a/src/utils.ts b/src/utils.ts
index ad0673e90..90dfe0a21 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -116,13 +116,6 @@ export function randSeedEasedWeightedItem<T>(items: T[], easingFunction: string
   return items[Math.floor(easedValue * items.length)];
 }
 
-export function getSunday(date: Date): Date {
-  const day = date.getUTCDay();
-  const diff = date.getUTCDate() - day;
-  const newDate = new Date(date.setUTCDate(diff));
-  return new Date(Date.UTC(newDate.getUTCFullYear(), newDate.getUTCMonth(), newDate.getUTCDate()));
-}
-
 export function getFrameMs(frameCount: integer): integer {
   return Math.floor((1 / 60) * 1000 * frameCount);
 }