For those familiar with gematria, the basic method is pretty straight forward.
The calculations for the dates of statehood are also arranged in a consistent pattern.
For instance, the date for New York's ratification of the Constitution and statehood as the 11th state is
July 26, 1788.
The first calculation always has the numbers broken down into single digits.
7 + 2 + 6 + 1 + 7 + 8 + 8 = 39
If the day of the month is the 10th or higher, the next figure is summed with the day of the month intact.
7 + 26 + 1 + 7+ 8 + 8 = 57
The third calculation breaks the date into pairs like as shown below.
7 + 26 + 17 + 88 = 138
The fourth calculation leaves out the first paired grouping of the year in the date.
7 + 26 + 88 = 121
The screenshots shown here illustrate how these dates are arranged on the GTFS.
For states like Massachusetts that have dates with single digit months and single digit days of the month, there will only be three calculations. For example the date for Massachusetts' statehood is February 6, 1788.
2 + 6 + 17 + 88 = 113
2 + 6 + 88 = 96
The rest of the table should be self explanatory. If you think the table can be expanded or improved in any way, let me know. Thanks!