For all regular business, Subaru Telescope observes the following regular business hours:

8:00 AM - 4:30 PM (HST)
Monday - Friday

• Subaru Telescope observes Hawaii state holidays. In addition, summit tours and the Hilo Base Visitors Gallery may close temporarily due to special events.
  
• For information on public tours of the Subaru telescope on the summit of Mauna Kea, please visit our summit tour web page.