1:7 was my guess, but quick check from 1990 to 2200 shows it's much higher, in 60 out of 210 years it will be Friday on Programmers' Day, with all days occurring 29, 31, 30, 0, 60, 30 and 30 times for Monday through Sunday respectively.
1:7 was my guess, but quick check from 1990 to 2200 shows it's much higher, in 60 out of 210 years it will be Friday on Programmers' Day, with all days occurring 29, 31, 30, 0, 60, 30 and 30 times for Monday through Sunday respectively.