D20507: Update Japanese holidays

[N. Higa]

nhiga requested review of this revision.

REPOSITORY
  R43 KDE PIM

REVISION DETAIL
  https://phabricator.kde.org/D20507

To: nhiga, #kde_pim, dvratil
Cc: dvratil, kde-pim, dvasin, rodsevich, winterz, vkrause, mlaurent, knauss
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