Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: What a sad day...1st day of Fall...I don't dislike Fall...I just LOVE Summer #FirstDayofFall #goodbyesummer #sadness #bathingsuitsforever
This tweet contains emotions: 
pessimism, sadness