Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Good night, Twitter world! Wish you all good sleep / productive jovial days! :)
This tweet contains emotions: 
joy, optimism