關於「GSIS School calendar 2021」標籤，搜尋引擎有相關的訊息討論：

School Calendar - German Swiss International School 德瑞國際學校gsis.hk › School Life › News & Events[PDF] 2021-2022 Annual Calendarresources.finalsite.net › images › gsissckr › 2021-2022AnnualCalenda...20210507-School-Holiday-Calendar-2021-22.pdfwww.gsis.edu.hk › plugins › pdf-v