…(ant.) A healthy spleen in a dream means that one’s coffers are well protected and that he will enjoy success in his life. If one’s spleen is inflamed or larger than usual in the dream, it means that one will fail to achieve his goals, or to change his general condition, or that he will become physically weakened by a debilitating illness. Suffering from one’s spleen in a dream means that one will spoil or waste a great wealth which he is supposed to use to support his family. (Also see Body’)…
Dream dictionary: Waste dream meanings
If you see a particular date the dream may be talking to you about the need to make a decision and if you only see the calendar then it means that you waste too much time on matters of little interest.