Mole Day 2026 - Celebrate Avogadro’s Number on October 23 #3784141 (License: Personal Use)

A close-up shows a hand using a fine-tip marker to write “Mole Day” in bold green script on a paper calendar square for October 23, with the time “6:02 · 10 23” noted below. The date is emphasized with orange highlighter cross-hatching and a green circle around “23,” evoking chemistry classroom energy and student engagement. This visual captures the playful yet educational spirit of National Mole Day, observed by chemists and educators worldwide.

Used on educational websites, science blogs, or chemistry resource pages to promote Mole Day events, lesson plans, or outreach activities. Matches user intent for teachers seeking classroom ideas, students looking for science holiday info, or institutions planning STEM celebrations.