Extended Service at ISaIS Up to 8:00 PM 24 Jan 202025 Sep 2023 by Library UP Diliman, posted in Advisories âš ï¸ A friendly reminder that Extended Service at the Reference section is up to 8:00 PM only due to the #GonzalezHallRenovation pic.twitter.com/M3HfmdhbM8— UPD Library (@UPDLibrary) January 24, 2020