Days Until Day of the Programmer

About Day of the Programmer

The Day of the Programmer is observed on the 256th day of the year (September 13 in non-leap years, September 12 in leap years), chosen because 256 (2 to the 8th power) is the number of distinct values a single byte can represent — a deliberately programmer-relevant number.

The observance gained particular formal recognition in Russia, where it was officially established as a professional holiday by presidential decree in 2009, though it's informally marked by software developers internationally as well.

The number 256 also happens to be the maximum number of values an unsigned 8-bit integer can hold (0 through 255), a detail of direct relevance to programmers working with low-level data types.

Russia's official 2009 presidential decree specifically defines the holiday's date using the 256th-day rule rather than a fixed calendar date, meaning its exact date shifts by one day in leap years there too.