On March 21 2006, Jack Dorsey published his first tweet.

It was another three years and a month before I took the step to set up my own Twitter account and then tweet. This is my first tweet.

How to Find Your First Tweet

• Visit your Twitter profile to find the date you joined Twitter.
• Use Twitter’s advanced search to add your Twitter account @username (Account – from these accounts) and a date range to find your first tweets (Join date + a few months).
  https://twitter.com/search-advanced
• Scroll down to the bottom of the search results to get your first tweet.