This calendar marks 57 yearly anniversaries, from “Birth of al-Biruni (973) and the Story of Zero” to “Pi Calculated to 100 Trillion Digits (2022)”. Each event appears on its date every year in your calendar app, so you can turn the day into a short history lesson.
How it works: after buying, you get an .ics file that works with Google Calendar, Apple Calendar and Outlook.
Sample events (preview)
- Oct 23, 2026 — The Four Colour Problem Is Posed (1852)
- Oct 25, 2026 — Birth of Évariste Galois (1811)
- Oct 26, 2026 — Birth of Shiing-Shen Chern (1911)
- Nov 02, 2026 — Birth of George Boole (1815)
- Nov 09, 2026 — Birth of Benjamin Banneker (1731)
Like this? Find printable lessons and coloring books in our Gumroad shop.