YRC Worldwide typically provides customer service during standard business hours. Generally, these hours are Monday through Friday, from 8:00 AM to 5:00 PM in the local time zone of the customer service center. These times may vary depending on the specific service location or regional operations. It is important for customers to refer to the YRC Worldwide website for the most accurate and up-to-date information regarding customer service hours and any potential holiday schedules, as they can differ. Additionally, there may be options available for after-hours support or online services that could assist customers outside of standard hours. Checking the official website will offer the best insight into current customer service availability.