On September 17, 158, Dutch sailors claimed the island of Mauritius for the Netherlands. They named it after Maurice, Prince of Orange and Count of Nassau — September 17, 1776: The Fortress Presidio of San Francisco was founded in New Spain to gain a foothold in Alta California and secure the San Francisco Bay. — Today, September 17th, we celebrate Constitution Day in these United States.  This is in remembrance that on September 17, 1787, the US Constitution was signed by delegates at the Philadelphia Convention. — SurvivalBlog Writing Contest Today we present another entry for Round 120 of the … The post Preparedness Notes for Wednesday — September 17, 2025 appeared first on SurvivalBlog.com.