behind the times

Prepositional phrase

idiomatic

(idiomatic) Out of date; old-fashioned; obsolete; outmoded; outdated.

Japanese Meaning

時代遅れ / 古臭い / 旧態依然 / 現代的でない

The board realized their marketing strategy was behind the times and urgently requested a complete overhaul.

取締役会は自社のマーケティング戦略が時代遅れであることに気づき、至急全面的な見直しを要請しました。

Sense（1）

(idiomatic) Out of date; old-fashioned; obsolete; outmoded; outdated.