noun-modifying (irregular)
commemorative; momentous; monumental
Used prenominally to describe an event, day, achievement, or occasion that deserves to be remembered or celebrated. Often appears in phrases like 記念すべき日 or 記念すべき出来事.
今日は記念すべき日だ。
Today is a day to remember.
これは記念すべき出来事です。
This is a momentous event.