all the time:始终,一直
eg:He works hard all the time.
all time:全时工作的(空前的,全部时间的)
Mozart was,after all,not a mere purveyor of music but one of the supreme dramatic geniuses of all time.
莫扎特毕竟不仅是作曲家,而且是空前的最大戏剧天才之一.
all day 与 all the day应该没有明显区别吧.