Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
On April 30, 1993, CERN placed the World Wide Web software in the public domain, letting anyone use, copy, and build on it for nothing.
On April 30, 1803, the US agreed to buy 828,000 square miles from France for $15 million — about 4 cents an acre.
On April 30, 1789, George Washington took the first presidential oath of office on a balcony at Federal Hall in New York City.
