Well, when you look at the top of the tons of confusing stuff that I put in my report to hide any errors that I make, the first thing that is mentioned is the quarter and which year it is in the reign of the current emperor (Taisho, 1914 being the first year in the Wesworld; in the real world Taisho 1 was 1912).
The date mentioned in the 'subject' bit of the thread is "Taisho 'X' Nen 'Y' Getsu 'Z' Nichi", where 'X' is the year of the emperor's reign, 'Y' is the month and 'Z' is the day.
So "Taisho 10 Nen 9 Getsu 30 Nichi" is Tenth year of the Emperor Taisho (=1924), ninth month, 30th day (or to put it simple: September 30, 1924).
It wasn't noon yet. That's my excuse and I'm stickin' to it!
Well that can mean either too much alcohol or not enough. :-)