Initial commit

Made-with: Cursor

frontend/src/lib/pragueDate.ts

@@ -0,0 +1,18 @@
+/** Kalendářní den YYYY-MM-DD v časové zóně Europe/Prague. */
+export function pragueCalendarDay(d = new Date()): string {
+  return new Intl.DateTimeFormat('en-CA', {
+    timeZone: 'Europe/Prague',
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+  }).format(d)
+}
+
+export function instantPragueDay(iso: string): string {
+  return new Intl.DateTimeFormat('en-CA', {
+    timeZone: 'Europe/Prague',
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+  }).format(new Date(iso))
+}