Programmer's Day
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| Programmer's Day | |
|---|---|
| Observed by | Worldwide |
| Type | International |
| Date | 256th (hexadecimal 100th, or the 28th) day of each year (September 13 in common years, and September 12 in leap years) in Russia |
| 2025 date | 2025-09-13 |
| Duration | "1 day" |
| Frequency | Annual |
| First time | 2009 |
| Related to | Engineer's Day |
Programmer's Day, also known as the Day of the Programmer and occasionally as Day 2^8, is an international professional day that is celebrated on the 256th (hexadecimal 100th, or the 28th) day of each year. This is September 13 in common years and September 12 in leap years.
The number 256 (28) was chosen because it is the number of distinct values that can be represented with a byte, a value well known to programmers. 256 is also the highest power of two that is less than 365 and 366, the number of days in a common year and leap year respectively.
History
As early as 2002, this particular day was proposed by Valentin Balt and Michael Cherviakov (aka htonus), employees of Parallel Technologies (a software company), who tried to gather signatures for a petition to the government of Russia to recognize the day as the official Day of the Programmer.[1]
On July 24, 2009, the Ministry of Communications and Mass Media of Russia issued a draft of an executive order on a new public holiday, the Day of the Programmer.[2][3] On September 11, Russian president Dmitry Medvedev signed the decree.[4][5]
Variations
Chinese Programmer's Day
In China, the programmer's day is October 24,[6] which has been established for many years.[7]
The date was chosen because it can also be written as 1024, which is equal to 210 and corresponds to the kibi (Ki) binary prefix. It is also a consistent date regardless of leap years.[citation needed]
Ukrainian Programmer's Day
In Ukraine, the day was observed on both January 7 (as International Programmer's Day, founded in 2007) and the 256th-day September date. In 2022, the country's IT community ceased observing the September date, as it was of Russian origin. In 2025, the Government of Ukraine formally recognised programmer's day as January 7.[8]
See also
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- Engineer's Day
- Nybble Day
- Pi Day
- Secretary's Day
- System Administrator Appreciation Day
- Tau Day
- World Information Society Day
References
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- ^ Page Module:Citation/CS1/styles.css has no content."«Праздник 256-го дня»" (in русский).
{{cite web}}: CS1 maint: deprecated archival service (link) - ^ Page Module:Citation/CS1/styles.css has no content."«У программистов может появиться свой официальный праздник»" (in русский). Archived from the original on 2009-09-28.
- ^ Page Module:Citation/CS1/styles.css has no content."Ъ-Новости - Российские программисты получат профессиональный праздник". Kommersant.ru (in русский). Retrieved 2011-09-13.
{{cite web}}: CS1 maint: deprecated archival service (link) - ^ Page Module:Citation/CS1/styles.css has no content."Dmitry Medvedev issued an executive order establishing a new professional holiday, the Day of the Programmer". Kremlin.ru. 2009-09-12. Archived from the original on 2010-09-16. Retrieved 2009-09-12.
Day of the Programmer will be celebrated on the 256th day of each year, that is on September 13 or 12 depending on whether the year is a leap year.
- ^ Page Module:Citation/CS1/styles.css has no content."Президент России подписал указ об утверждении Дня программиста" (in русский). Retrieved 2011-07-18.
{{cite web}}: CS1 maint: deprecated archival service (link) - ^ Page Module:Citation/CS1/styles.css has no content."中国程序员节，10月24日，你同意吗？" (in 中文（中国大陆）). Retrieved 2018-02-05.
- ^ Page Module:Citation/CS1/styles.css has no content."中國將10月24日 暫定為 程式設計師節(非官方認定) Tsung's Blog". blog.longwin.com.tw (in 中文（臺灣）). Retrieved 2018-07-02.
- ^ Page Module:Citation/CS1/styles.css has no content."В Україні запровадили нове професійне свято – День програміста — Forbes.ua". forbes.ua (in українська). 24 December 2025.
Bibliography
- Script error: No such module "Lang". (President of the Russian Federation. Decree #1034 of September 11, 2009 On the Day of the Programmer. Effective as of September 11, 2009.).
