{
 "id": "shopify-78ff47c891",
 "platform": "shopify",
 "title": "Tax summary webhook `created_at` field now returns UTC timezone",
 "summary": "The created_at field from tax_summaries/create webhook for tax partners will now return timestamps in UTC format with the Z suffix, including millisecond precision. Update your parsing logic to handle the new format.",
 "categories": [
  "breaking_change",
  "format_change"
 ],
 "tags": [
  "2026-01",
  "API",
  "Action Required",
  "Admin GraphQL API",
  "Breaking API Change",
  "Events & webhooks"
 ],
 "published_date": "2025-11-20",
 "effective_date": null,
 "effective_date_precision": null,
 "source_url": "https://shopify.dev/changelog/tax-summary-webhook-created-at-field-now-returns-utc-timezone",
 "source_name": "Shopify developer changelog",
 "fetched_at": "2026-10-17T03:44:00+00:00",
 "collector": "shopify/changelog",
 "first_seen": "2026-10-17T01:05:46+00:00",
 "in_source": true,
 "last_seen_in_source": "2026-10-17T03:44:00+00:00",
 "upcoming": false,
 "url": "https://adstackwatch.com/changes/shopify-78ff47c891/"
}