timezone

src/app/api/reports/route.ts

@@ -37,9 +37,12 @@ export async function POST(req: Request) {
   const body = await req.json();
   const { managerName, date } = body;
 
-  // Check if a report already exists for this date and user
-  const reportDate = date ? new Date(date) : new Date();
-  reportDate.setHours(0, 0, 0, 0);
+  // Check if a report already exists for this date and user.
+  // Client always sends a YYYY-MM-DD date string in Central US time;
+  // we store it as UTC midnight so the date string is stable across timezones.
+  const reportDate = date
+    ? new Date(`${date}T00:00:00.000Z`)
+    : new Date(new Date().toLocaleDateString('en-CA', { timeZone: 'America/Chicago' }) + 'T00:00:00.000Z');
 
   let report = await prisma.report.findFirst({
     where: {