Info

All times are set to Japanese Time (UTC+9)

Use the following function to change it. e.g., set n to -9 hour for Coordinated Universal Time(UTC+0). Copy code block to org-world-cup-2018.org and use C-c to eval it.

(save-excursion
 (goto-char (point-min))
  (while (re-search-forward "[[<]" nil t)
    (when (org-at-timestamp-p t)
      (org-timestamp-change n 'hour))))