September 9 officially registered as “Attack on Titan Day," commemorating the date Hajime Isayama's manga began in 2009.
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Frantic Anime is tracking “September 9 Officially Registered as Attack on Titan Day, Special Projects Announced”. This update is filed under Announcements, Manga News. Related developments will stay grouped on Frantic Anime so readers can follow the story without leaving the newsroom.
Reporting provenance: Anime Corner.