See all articles from Timelinez v2 n11
TS2068 BASIC perpetual calendar program that displays any month/year on screen with the correct day-of-week alignment. Navigation keys: 7 (forward one month), 6 (back one month), 8 (forward one year), 5 (back one year), space bar (re-display directions), 0 (COPY to printer). The algorithm handles leap years including century-year corrections. Author notes that lines 475-500 are missing from the published listing.