According to the search results, there are several holidays and observances that fall on September 26, but none of them are federal holidays in the United States. Here are some of the holidays and observances that fall on September 26, 2023:

• National Woman Road Warrior Day
• Record Store Day
• National Better Breakfast Day
• National Pancake Day
• National Day of Praise and Worship
• European Day of Languages
• European Languages Day
• Human Resource Professional Day
• International Day for the Total Elimination of Nuclear Weapons
• National Dumpling Day
• National Hari Day
• National Key Lime Pie Day
• National Law Enforcement Suicide Awareness Day
• National Mesothelioma Awareness Day
• Johnny Appleseed Day
• Lumberjack Day
• Shamu the Whale Day
• Alpaca Day
• National Family Day
• Love Note Day

Its important to note that some of these holidays are not widely recognized or celebrated, and some are specific to certain countries or regions.