📅 September 23 in the Time Tunnel
What happened on September 23? Travel back in time and find out — then test yourself with the quiz.
⏳ On this day in history
- 1806Lewis and Clark returned to St. Louis after their long journey to the Pacific
- 1846Astronomers discovered the planet Neptune
- 1905Norway and Sweden signed an agreement and separated peacefully
🎂 Born on September 23
- 💡 Hippolyte Fizeau (1819) — physicist who measured the speed of light
See everyone born on September 23 →
September 23 quiz
In what year? 🧭 Lewis and Clark returned to St. Louis after their long journey to the Pacific
In what year? 🪐 Astronomers discovered the planet Neptune
In what year? 🕊️ Norway and Sweden signed an agreement and separated peacefully
Which famous person was born on September 23?