diff --git a/static/app/components/pageFilters/actions.tsx b/static/app/components/pageFilters/actions.tsx
index 23b969fc75a1..314b182d1e13 100644
--- a/static/app/components/pageFilters/actions.tsx
+++ b/static/app/components/pageFilters/actions.tsx
@@ -19,7 +19,10 @@ import {
   setPageFiltersStorage,
 } from 'sentry/components/pageFilters/persistence';
 import {PageFiltersStore} from 'sentry/components/pageFilters/store';
-import {parseStatsPeriod} from 'sentry/components/timeRangeSelector/utils';
+import {
+  parseStatsPeriod,
+  STATS_PERIOD_REGEX,
+} from 'sentry/components/timeRangeSelector/utils';
 import {OrganizationStore} from 'sentry/stores/organizationStore';
 import type {DateString, PageFilters, PinnedPageFilter} from 'sentry/types/core';
 import type {Organization} from 'sentry/types/organization';
@@ -318,6 +321,15 @@ export function initializeUrlState({
   if (maxPickableDays && pageFilters.datetime) {
     let {start, end} = pageFilters.datetime;
 
+    if (
+      pageFilters.datetime.period &&
+      !STATS_PERIOD_REGEX.test(pageFilters.datetime.period)
+    ) {
+      // Invalid period from localStorage or URL — fall back to the default period
+      // rather than letting parseStatsPeriod throw and crash the page.
+      pageFilters.datetime.period = defaultDatetime.period;
+    }
+
     if (pageFilters.datetime.period) {
       const parsedPeriod = parseStatsPeriod(pageFilters.datetime.period);
       start = parsedPeriod.start;
diff --git a/static/app/components/timeRangeSelector/utils.tsx b/static/app/components/timeRangeSelector/utils.tsx
index a6e1d5250806..5f00f6d80a7d 100644
--- a/static/app/components/timeRangeSelector/utils.tsx
+++ b/static/app/components/timeRangeSelector/utils.tsx
@@ -29,7 +29,7 @@ type RelativeUnitsMapping = Record<
 
 const DATE_TIME_FORMAT = 'YYYY-MM-DDTHH:mm:ss';
 
-const STATS_PERIOD_REGEX = /^(\d+)([mhdw])$/;
+export const STATS_PERIOD_REGEX = /^(\d+)([mhdw])$/;
 
 const SUPPORTED_RELATIVE_PERIOD_UNITS: RelativeUnitsMapping = {
   m: {