The Public Health Library offers reference service Monday through Friday, 10am-12 and 2pm-5. Other libraries on campus offer reference services at various other times, including Saturdays and weekday evenings. You can also chat with a UC reference librarian until 9pm on Sunday through Thursday. This, and other reference chat services, are described on our Reference Services web page. Don’t hesitate to get that thorny question answered whenever and wherever you can!