Let's discover and program: HP 12C (3 non-financial examples)

Excellent HP12C emulator (no installation required): https://stendec.io/ctb/hp12c.html Other machines (HP11C, 15C, 16C): https://stendec.io/ctb/ English Wikipedia page: https://en.wikipedia.org/wiki/HP-12C Example 1: On what exact date will you be, or were you, the same age as your mother on the day you were born? Example 2: What are all the Friday the 13ths in a given year? (Note: In the video, I use October 13, 2000, as a reference, but of course, you can use any Friday.) Example 3: What are the same years as a given year? For example, 2021 and 2027 have exactly the same calendars (except for movable holidays like Easter and Ascension Day). SwissMicros machines: https://www.swissmicros.com/products Truly SC123: https://fr.aliexpress.com/item/329176...