The date that a user's ban will expire is not displayed on the error message shown to that user if they were banned as a result of receiving warning points and exceeding a ban threshold as set by a Warning Action. To replicate this, create a Warning Action to ban a user after a point threshold and configure it to apply for the time period "while at or above points threshold". Issue a warning to a user which will exceed that threshold (and result in them getting banned), then sign into that account and view the error message. Neither the reason for their ban nor - more importantly - how long their ban will last is displayed on this page. This is important, because most of the banned members in my community are banished as a result of accumulated and expiring warning points. If they don't know when these points expire, they try to contact moderation staff through other channels, and it creates more workload (and drama) for our moderators to deal with this additional communication with already disgruntled members.