If a work-related injury or illness results in days away from work by the employee, you must record the injury or illness if it involves one or more days away with a check mark in the space for cases involving days away and an entry for the number of calendar days away from work in the number of day’s column. If the employee is out for an extended period of time, you must enter an estimate of the days that the employee will be away and update the count when the actual number of days is known. The day the injury or illness occurs is not counted as a day away from work. 29 C.F.R. § 1904.7(b)(3).