Any sign that refers to an event of limited duration, including, but not limited to, entertainment, sporting events, elections, construction, sales of goods or real estate, rental of real estate, governmental actions of which public notice is required by law to be posted, or time-limited events of public interest. As used herein, the term “event” does not include short-term promotions or sales of commercial goods or services that are conducted by a business. (Ord. 7120-NS § 5 (part), 2009)