diff --git a/apps/backend/src/modules/quotes/handlers/getPeakHours.ts b/apps/backend/src/modules/quotes/handlers/getPeakHours.ts
index f63d57b..26907ed 100644
--- a/apps/backend/src/modules/quotes/handlers/getPeakHours.ts
+++ b/apps/backend/src/modules/quotes/handlers/getPeakHours.ts
@@ -2,7 +2,6 @@ import type { Context } from "hono";
 import type { QuoteType } from "../../../generated/prisma/client";
 import { cache } from "../../../lib/cache";
 import { prisma } from "../../../lib/prisma";
-import { parseLocalDate, startOfNextLocalDay } from "../../../lib/utils";
 
 const VALID_TYPES = ["BLUE", "BNA", "BELO"] as const;
 
@@ -18,21 +17,7 @@ export async function getPeakHours(c: Context) {
     );
   }
 
-  const type = rawType as QuoteType;
-  const startDateParam = c.req.query("startDate");
-  const endDateParam = c.req.query("endDate");
-
-  const now = new Date();
-  const startDate = startDateParam
-    ? parseLocalDate(startDateParam)
-    : new Date(now.getFullYear(), now.getMonth(), 1);
-  const endDate = endDateParam ? startOfNextLocalDay(endDateParam) : now;
-
-  if (Number.isNaN(startDate.getTime()) || Number.isNaN(endDate.getTime())) {
-    return c.json({ error: "Invalid date format. Use ISO 8601." }, 400);
-  }
-
-  const cacheKey = `quotes:peak-hours:${type}:${startDate.toISOString()}:${endDate.toISOString()}`;
+  const cacheKey = `quotes:peak-hours:${rawType}`;
   const cached = cache.get(cacheKey);
   if (cached) return c.json(cached);
 
@@ -56,8 +41,6 @@ export async function getPeakHours(c: Context) {
         ) AS rn
       FROM "quotes_history"
       WHERE "type" = ${rawType}::"QuoteType"
-        AND "timeStamp" >= ${startDate}::timestamptz
-        AND "timeStamp" < ${endDate}::timestamptz
     )
     SELECT
       peak_hour AS hour,
@@ -75,8 +58,6 @@ export async function getPeakHours(c: Context) {
     SELECT COUNT(DISTINCT DATE("timeStamp"))::int AS count
     FROM "quotes_history"
     WHERE "type" = ${rawType}::"QuoteType"
-      AND "timeStamp" >= ${startDate}::timestamptz
-      AND "timeStamp" < ${endDate}::timestamptz
   `;
 
   const response = {
diff --git a/apps/frontend/src/features/analysis/AnalysisPage.tsx b/apps/frontend/src/features/analysis/AnalysisPage.tsx
index 3edc33c..183f7f6 100644
--- a/apps/frontend/src/features/analysis/AnalysisPage.tsx
+++ b/apps/frontend/src/features/analysis/AnalysisPage.tsx
@@ -101,11 +101,8 @@ export function AnalysisPage({ currency }: { currency: string }) {
   );
   const { data: monthlyLastData } = useMonthlyLast();
 
-  const { data: peakHoursData, isLoading: peakHoursLoading } = usePeakHours(
-    "BELO",
-    startDateStr,
-    endDateStr,
-  );
+  const { data: peakHoursData, isLoading: peakHoursLoading } =
+    usePeakHours("BELO");
 
   const chartData = useMemo(() => {
     if (!daily) return [];
diff --git a/apps/frontend/src/lib/api.ts b/apps/frontend/src/lib/api.ts
index 3d93a47..0a4ba95 100644
--- a/apps/frontend/src/lib/api.ts
+++ b/apps/frontend/src/lib/api.ts
@@ -122,13 +122,8 @@ export function getHistoricalMinMax(type: string): Promise<HistoricalMinMax> {
   return fetcher<HistoricalMinMax>(`/api/quotes/${type}/historical/min-max`);
 }
 
-export function getPeakHours(
-  type: string,
-  startDate: string,
-  endDate: string,
-): Promise<PeakHoursResponse> {
-  const params = new URLSearchParams({ startDate, endDate });
-  return fetcher<PeakHoursResponse>(`/api/quotes/${type}/peak-hours?${params}`);
+export function getPeakHours(type: string): Promise<PeakHoursResponse> {
+  return fetcher<PeakHoursResponse>(`/api/quotes/${type}/peak-hours`);
 }
 
 export type MonthlyLast = {
diff --git a/apps/frontend/src/lib/queries.ts b/apps/frontend/src/lib/queries.ts
index 60a7faa..9572b45 100644
--- a/apps/frontend/src/lib/queries.ts
+++ b/apps/frontend/src/lib/queries.ts
@@ -64,8 +64,8 @@ export const quoteKeys = {
     ["quotes", type, "daily", startDate, endDate] as const,
   historicalMinMax: (type: string) =>
     ["quotes", type, "historicalMinMax"] as const,
-  peakHours: (type: string, startDate: string, endDate: string) =>
-    ["quotes", type, "peakHours", startDate, endDate] as const,
+  peakHours: (type: string) =>
+    ["quotes", type, "peakHours"] as const,
 };
 
 export function useQuotes() {
@@ -135,14 +135,10 @@ export function useHistoricalMinMax(type: string) {
   });
 }
 
-export function usePeakHours(
-  type: string,
-  startDate: string,
-  endDate: string,
-) {
+export function usePeakHours(type: string) {
   return useQuery({
-    queryKey: quoteKeys.peakHours(type, startDate, endDate),
-    queryFn: () => getPeakHours(type, startDate, endDate),
+    queryKey: quoteKeys.peakHours(type),
+    queryFn: () => getPeakHours(type),
     staleTime: 30_000,
   });
 }