Make sure component always returns midnight utc.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@tp/tp-date-picker",
-  "version": "3.0.1",
+  "version": "3.0.2",
   "description": "",
   "main": "tp-date-picker.js",
   "scripts": {

tp-date-picker.js

@@ -290,15 +290,9 @@ class TpDatePicker extends FormElement(LitElement) {
     for (const el of e.composedPath()) {
       if (el.date !== undefined) {
         this.value = el.date;
-        // Interpret the selected date as being in the user's timezone, output as UTC ISO string
         const selectedDate = el.date;
-        let outputValue;
-        const zone = this.timeZone || 'local';
-        const localDate = DateTime.fromObject(
-          { year: selectedDate.year, month: selectedDate.month, day: selectedDate.day },
-          { zone }
-        );
-        outputValue = localDate.toUTC().toISO();
+        // Date-only fields always store UTC midnight — the calendar date is timezone-agnostic.
+        const outputValue = DateTime.utc(selectedDate.year, selectedDate.month, selectedDate.day).toISO();
         this.dispatchEvent(new CustomEvent('value-changed', { detail: outputValue, bubbles: true, composed: true }));
         return;
       }