belatedly

after the due, usual, or proper time she belatedly realized that it had been her friend's birthday the day before Synonyms late, delinquently, tardilyRelated Words afterward (or afterwards), anon, eventually, later, latterly, subsequently, thereafter; dilatorily, laggardly, pokily, slow, slowly, sluggishlyNear Antonyms immediately, promptly, punctually; pronto, quickly, rapidly, snappily, speedily, swiftlyAntonyms beforehand, early, inopportunely, precociously, prematurely, unseasonably