Avoid double-applying timezone offset on return dates

custom_components/nestquest/www/nestquest-cards.js

@@ -622,10 +622,7 @@ function Vt(s, t) {
     const o = new Date(n, i - 1, r);
     return Number.isNaN(o.getTime()) ? null : o;
   }
-  let a = Date.UTC(n, i - 1, r);
-  for (let o = 0; o < 2; o += 1)
-    a -= Wt(a, t);
-  const l = new Date(a);
+  const a = Date.UTC(n, i - 1, r), l = new Date(a - Wt(a, t));
   return Number.isNaN(l.getTime()) ? null : l;
 }
 function Zt(s) {

frontend/src/cards/party-board.ts

@@ -181,11 +181,8 @@ function parseIsoDate(value: unknown, timeZone?: string): Date | null {
     const local = new Date(year, month - 1, day);
     return Number.isNaN(local.getTime()) ? null : local;
   }
-  let utcMs = Date.UTC(year, month - 1, day);
-  for (let pass = 0; pass < 2; pass += 1) {
-    utcMs -= zoneOffsetMs(utcMs, timeZone);
-  }
-  const date = new Date(utcMs);
+  const utcMs = Date.UTC(year, month - 1, day);
+  const date = new Date(utcMs - zoneOffsetMs(utcMs, timeZone));
   return Number.isNaN(date.getTime()) ? null : date;
 }