みどりの日 2017
![](https://groups.oist.jp/sites/default/files/styles/group_image/public/eventimg/1703/oist-logo_big-shisa_little-oist_4.png?itok=91ot9W7x)
Date
2017年5月4日 (木) 0:00
Description
National Holiday.
All-OIST Category:
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National Holiday.
Subscribe to the OIST Calendar: Right-click to download, then open in your calendar application.