An improvised month divination
Month ID is an original method to secretly gain knowledge of a stranger's month of birth. (Actually, any information among twelve possibilities...) It can be done independently, anytime, anywhere, without any preparation at all, or props.
You ask a person you just met: "Do you know your zodiac digit? It is a digit between 0 and 9 that is influenced by the season, the climate, the month of birth and other factors. Here is how to calculate your ZODIAC DIGIT: Think of your birth month and do the following ... " (Very simple, just a couple of additions, that lead to a single-digit number. They are justified by your patter, and depend on factors and variables you can not possibly know.)
The result will get you the knowledge of their birth month, without any question. You will also get a bonus fake newspaper article, to make everything credible for the audience, and easier for you.
NOTE: Instead of revealing the month, this can be followed by ZIP, my Zodiac sign prediction when I meet somebody I've never seen before. (You do not need to know the day of birth for ZIP).
1st edition 2016, 15 pages.
word count: 2930 which is equivalent to 11 standard pages of text