Dates that contradict the calendar or each other

Checks

• Past event shown as upcoming event_in_the_past_shown_as_upcoming
• Expired offer still promoted offer_expired_but_still_promoted
• Copyright year differs between page layouts copyright_year_differs_between_templates
• Claims recent update with no change updated_recently_claim_without_change
• Deadline has passed deadline_passed

Findings

• A date on the page contradicts the calendar or the page's own history

What this relies on

A past date presented as future is an oversight.

How to verify by hand

A person; archive pages are the usual exception.