The antonyms for the phrase "bring up to date" would be words that signify a lack of updating or modernizing. Words like "outdated," "obsolete," "archaic," and "antiquated" would all be suitable antonyms. These words connote a sense of irrelevance, stagnation, or even regression, and suggest an inability or unwillingness to adapt to changing circumstances. The opposite of bringing something up to date is allowing it to fall by the wayside or refusing to update it to match current standards. In a fast-paced world where technology and ideas move quickly, it is essential to stay current and up to date in order to compete and succeed.