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fix: use local time with 3am cutover for today's date

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new Date().toISOString() returns UTC, causing the calendar to advance
to the next day at 8pm EDT / 7pm EST. getTodayLocal() reads local
wall-clock time and rolls back one day before 3am so the calendar
stays on the current day through the night.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Josh Wright
2026-04-04 20:15:52 -04:00
parent fdea8443fb
commit a87f97ef53
4 changed files with 38 additions and 11 deletions
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17
app/page.tsx
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@@ -5,6 +5,7 @@ import { Legend } from "@/components/Legend";
import { EmptyState } from "@/components/EmptyState";
import { PARKS, groupByRegion } from "@/lib/parks";
import { openDb, getDateRange } from "@/lib/db";
import { getTodayLocal } from "@/lib/env";
interface PageProps {
searchParams: Promise<{ week?: string }>;
@@ -18,9 +19,10 @@ function getWeekStart(param: string | undefined): string {
return d.toISOString().slice(0, 10);
}
}
const today = new Date();
today.setDate(today.getDate() - today.getDay());
return today.toISOString().slice(0, 10);
const todayIso = getTodayLocal();
const d = new Date(todayIso + "T00:00:00");
d.setDate(d.getDate() - d.getDay());
return d.toISOString().slice(0, 10);
}
function getWeekDates(sundayIso: string): string[] {
@@ -32,9 +34,10 @@ function getWeekDates(sundayIso: string): string[] {
}
function getCurrentWeekStart(): string {
const today = new Date();
today.setDate(today.getDate() - today.getDay());
return today.toISOString().slice(0, 10);
const todayIso = getTodayLocal();
const d = new Date(todayIso + "T00:00:00");
d.setDate(d.getDate() - d.getDay());
return d.toISOString().slice(0, 10);
}
export default async function HomePage({ searchParams }: PageProps) {
@@ -42,7 +45,7 @@ export default async function HomePage({ searchParams }: PageProps) {
const weekStart = getWeekStart(params.week);
const weekDates = getWeekDates(weekStart);
const endDate = weekDates[6];
const today = new Date().toISOString().slice(0, 10);
const today = getTodayLocal();
const isCurrentWeek = weekStart === getCurrentWeekStart();
const db = openDb();