Feature : Permalinks ordered by Date for Breadcrumbs

[Vrishabhsk]

What?

• Closes Breadcrumbs block: Add date-based permalinks #74966

Adds date-based permalinks support to the Breadcrumbs block. Now you can show breadcrumb trails like Home > 2026 > March > 12 > My Post Title to match date-based permalink structures.

Why?

If you use date-based permalinks on your site (like /2026/03/12/my-post/), your breadcrumbs should reflect that structure. Before this PR, the Breadcrumbs block only gave you two options:

1. Hierarchy - Home > Parent Page > Child Page (for pages)
2. Taxonomy - Home > Blog > Category > Post (for posts)

But a lot of sites use date-based permalinks, and there was no way to show Home > Year > Month > Day > Post Title in the breadcrumb trail. This PR adds that option.

How?

What changed

Block attribute

Added a new breadcrumbStyle dropdown with two options:

• Default - Uses the existing behavior (hierarchy for pages, taxonomy for posts)
• Date - Shows Year > Month > Day before the post title

The old prefersTaxonomy checkbox has been replaced with this dropdown. Existing blocks get migrated automatically.

PHP changes

Added a new block_core_breadcrumbs_get_date_breadcrumbs() function that builds the date trail from the post's publish date:

• Year links to the year archive
• Month links to the month archive (with localized month name)
• Day links to the day archive

Editor changes

Replaced the "Prefer taxonomy terms" checkbox with a cleaner "Breadcrumb style" dropdown. Also fixed a bug where switching styles would briefly show stale content.

Testing Instructions

1. Start the dev environment: npm run wp-env start
2. Create a few posts with different publish dates
3. Add a Breadcrumbs block to a post template (like single.html)
4. In the sidebar, try the Breadcrumb style dropdown:
   • Default should show taxonomy or hierarchy depending on your post type
   • Date should show Year > Month > Day > Post Title
5. On the frontend, click each date link and verify it goes to the right archive page

Preview

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Co-authored-by: Vrishabhsk <vrishabhsk@git.wordpress.org>
Co-authored-by: ntsekouras <ntsekouras@git.wordpress.org>

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