Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: @darwinwatersons @pennyfitzger31 @gumballwatter15 ok but why tomorrow a horrible day, my day was great!
This tweet contains emotions: 
joy, optimism