When validating my XML sitemap , google says: Invalid date An invalid date was

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Editorial Team

Asked: May 26, 20262026-05-26T14:31:45+00:00 2026-05-26T14:31:45+00:00

When validating my XML sitemap, google says:

Invalid date
An invalid date was found. Please fix the date or formatting before resubmitting.

I convert the mysql timestamp by:

gmdate('Y-m-d\TH:i:s', strtotime($row['modified']['value']))

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Editorial Team · Answer 1 · 2026-05-26T14:31:46+00:00

Editorial Team

The ‘lastmod’ element has to be of the format YYYY-MM-DD or YYYY-MM-DDThh:mmTZD so use:

gmdate('Y-m-d', strtotime($row['modified']['value']))

or

gmdate('Y-m-d\TH:i:s+00:00', strtotime($row['modified']['value']))

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