1592 Was THE Ultimate Pi Day BUT No One Would Have Known That — 3/14/1592.
The first 10 decimal digits are
Two reasons why nobody in 1592 would have realized this.
The 3/14 notation for month/date is primarily American and would NOT have been widely used in Europe in the 16th Century.
The value of Pi to 7-digits had been calculated by then BUT was NOT widely known.
Worth thinking about.