Determine the emotional tone of the following tweet: "This is the first time I've been sober on my birthday in 6 years. #recovery #sobriety #sober #soberissexy #sobernative". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".
joy, optimism