The NIST Child Care Center is open 12 months a year, 5 days a week (Monday - Friday) from 6:45 a.m. - 6:00 p.m. The Center is closed on all Federal holidays and three (3) additional days per year for staff development and program preparation activities. Individual classrooms have varied opening and closing times, but the CCC Director will work with you to accommodate schedules within the Center’s hours of operation, while maintaining required licensing ratios.