In this schedule, employers may require that employees work core hours, from 10 a.m. — 3 p.m., as an example. (thebalance.com)
You will understand that the nature of the business means possibly working outside of core hours in order to meet the industrial clients needs. (cv-library.ie)
We ask staff to be at work for core hours from around 9 - 3 so the teamwork can happen. (thebalance.com)