system_token_info and system_tokens() only provide the 'short', 'medium' or 'long' type tokens, but do not use system_get_date_types() to define what tokens are available. Therefore any module-defined or custom date types do not get tokens. I'm working on adding this support in Token.module for Drupal 7 in the meantime, but we should fix this is core as well.
Needs work
11.0 🔥
After being applied to the 8.x branch, it should be considered for backport to the 7.x branch. Note: This tag should generally remain even after the backport has been written, approved, and committed.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Could the issue summary be updated to the standard template.
Also recommend opening an MR as those are quicker to review and test.
Changing back to 11.x as the current development branch.