Two MIT students are doing wonders with Twitter data. They’re latest project is an Ngram equivalent for Twitter, meaning they can mine for the trending appearance of specific words on Twitter.
The graph above shows our linguistic tendency to refer to days by their name right up until the day before. At that point we start referring to the next day as tomorrow.
Take a look at the rest of their analysis at this blog post and definitely play with the data. My favorite word to search so far: startups.