Creepers explode during daytime

after grinding in hardcore for a day, safely returning from the nether with blaze rods, i saved my game and intentionally rested before attempting to find a stronghold.  upon booting up this morning, i noticed it was night, so i slept.  went outside to toss an eye of ender and got blown up by a day creeper.  this has made me so mad, i will not play minecraft again until this bug is fixed.  what is the point of sleeping, if not to prevent this?