Call day, also known as a workday, is a term commonly used to refer to a day when individuals are expected to report to work. However, there are several antonyms for this phrase that denote the opposite of working or being productive. One of these antonyms is a "day off," which refers to a day when individuals are not required to work or attend to any responsibilities. Another antonym is a "holiday," which denotes a special day or occasion celebrated by individuals or groups with a break from work or school. In addition, a "sick day" is also an antonym for call day, referring to a day taken off work due to illness or injury.