Memorizing the birth date of your celebrity idols, historical people, former presidents, sports legends will not make your life better neither memorizing the whole encyclopedia. You can only show off to your friends that you know a lot or your memory is sharp but in reality how in the world will those dates improve your situation in life?
Absorb only the information that will improve your life such as: how to make money, how to keep your body healthy, how to keep your relationship better, how to become efficient and any other things that are useful and has sense.
Is the birthdate of Michael Jordan going to be asked on a job interview? Is knowing the latest model of Nike shoes gonna help you pay your bills? Is knowing the different parts of the engine of a Ferrari gonna solve your problem? I am not saying that knowing those things are bad but my point here is you don't need to memorize all the details of stupid stuffs that ain't gonna help you improve your life.
If you are going to absorb information make sure you put something healthy to your brain and to your life, avoid absorbing information such as gossips, stupid gadgets that will make your debt bigger, disaster news, dates that doesn't matter etc. Always filter your mind, accept only the information that are worth remembering and not the information that will just make you look cool and smart.
