An employer offers each of its 50 employees 20 vacation days per year. As of January, no employees have taken vacation; however, each employee has earned 1.5 days. Vacation days that are unused at the end of the year may be carried forward to the following year. The employer encourages employees to use their full vacation allotment and thus does not anticipate forfeitures. Must the employer record a liability for the employees vacation days earned thus far?