How to fix non iso date on Wix

Steps for Wix

1. Wix generates most structured data automatically. Go to your Wix dashboard → Marketing & SEO → SEO Tools → Structured Data Markup to review any custom structured data you've added.
2. If you added custom JSON-LD via Wix's 'Add Structured Data Markup' tool, click 'Edit' on any schema containing a date field and manually correct the value to ISO-8601 format (e.g. '2019-09-23' or '2019-09-23T00:00:00Z').
3. For Wix Blog posts, Wix handles datePublished automatically in its built-in schema — ensure you're using the native Wix Blog feature rather than a custom workaround.
4. For Wix Stores products, structured data dates are also handled natively. If you see malformed dates, check if a third-party app (installed via the Wix App Market) is overriding the default schema.
5. If you're using Wix Velo (custom code), locate the relevant page's code panel and correct any date strings using JavaScript's toISOString() method: new Date(dateString).toISOString().
6. Re-test affected pages in Google's Rich Results Test.

{
  "@context": "https://schema.org",
  "@type": "WebPage",
  "name": "My Product Page",
  "datePublished": "2019-09-23",
  "dateModified": "2024-03-15T09:30:00Z"
}

What is non iso date?

Structured data (the behind-the-scenes code that tells Google what your page is about) includes date fields like `datePublished` and `dateModified`. These dates must be written in a specific international format called ISO-8601 — which looks like `YYYY-MM-DD` (for example, `2019-09-23`) or with a full timestamp like `2019-09-23T00:00:00Z`. When dates are written in a casual format like "09/23/2019 00:00:00" or "September 23, 2019", search engines cannot reliably parse them and may ignore them entirely. Think of it like filling out an official form: the field has a required format, and anything else gets rejected.

Google uses `datePublished` and `dateModified` to understand content freshness — a key signal for ranking pages in news, article, product, and general search results. If Google can't parse your date, it may estimate the wrong publish date or show no date at all in search results, making your listings look outdated or untrustworthy compared to competitors whose dates are formatted correctly. For Answer Engine Optimization (AEO), freshness signals help your content surface in AI-generated answers and featured snippets, where recency is often a deciding factor. A malformed date can also cause your structured data to fail Google's Rich Results Test, disqualifying your pages from rich result enhancements like breadcrumb trails, review stars, and FAQ dropdowns — all of which directly impact click-through rates and organic traffic.

See the complete Non iso date guide for every platform and the full background.