Stylus @stylus@social.afront.org
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dc is a semi-standard linux/unix RPN calculator. Many years ago, inspired by a code golf challenge, I performed an exhaustive search of digitless dc programs using the character set ~^-/*+|ABCDdEFIinOorvz to find all integers up to 1,000,000. emergent.unpythonic.net/015251

So as we roll towards 2026 I checked my list to find the shortest digitless dc program that produces the output 2026: CiDCAn

This program sets the input radix to "C" (12) then inputs the non-canonical base-13 number DCA (= 13 * 12**2 + 12 * 12 + 10), and finally prints it.

Non-canonical base 12 numbers are used in several upcoming years:

2026 CiDCAn
2027 CiDCBn
2028 CiDCCn
2029 CiDCDn
2030 CiDCEn
2031 CiDCFn
2038 CiDDAn

The current year (2025) can't be written in the same manner, because it would use the digit 9. It is still a 6-character program though: CF F*n. This multiplies the non-canonical base-10 number CF (135) by the non-canonica base10- number F (15).

All integers 0 through 1,000,000 from short, digitless dc programs

emergent.unpythonic.net

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