Home Assistant limits utility-meter offsets in its setup screen to twenty-seven days, making the latest resulting reset day the twenty-eighth. The old screen allowed an offset that reset a monthly meter on day twenty-nine, skipping February entirely in a non-leap year.
Existing meters with that invalid offset move to twenty-seven days automatically. Owners who need a later reset day can use a cron schedule in YAML; the normal YAML offset limit already matched the corrected screen.