October 13 is not a single universal holiday, but several important observances and “special days” fall on that date, depending on the year and country.

Key holidays on October 13

  • In some years, October 13 is the observed date of Columbus Day in the United States when it falls on the second Monday of October, which is a federal holiday honoring Christopher Columbus’ 1492 voyage and often tied to Italian American heritage.
  • Many states, cities, and institutions instead mark or pair that same second‑Monday date with Indigenous Peoples’ Day , focusing on the history, cultures, and resilience of Native peoples rather than celebrating Columbus.

Fixed international observances

Even when it is not the second Monday, the calendar date October 13 has some recurring observances:

  • The International Day for Disaster Risk Reduction , a UN‑backed observance highlighting efforts to reduce disaster risk and vulnerability, is held every year on October 13.
  • Various “awareness” or themed days (like Good Samaritan Day or English Language Day in some calendars for 2025) are listed on holiday/observance sites for October 13, though these are not universally official public holidays.

Fun and “national day” style holidays

A lot of modern “what holiday is October 13th” searches point to lighter, unofficial observances that can vary by year:

  • In some calendars, October 13 (or the nearest date) is linked with things like National Train Your Brain Day , National No Bra Day , or other themed “national days,” especially in 2026 and surrounding years.
  • These are typically social‑media‑driven or promotional observances rather than legal holidays, but they are often what people online are talking about when they ask what holiday October 13 is.

Why the answer changes by year

  • In the U.S., Columbus Day (and in many places Indigenous Peoples’ Day) is defined as the second Monday in October , so whether that lands on October 13 depends on the year’s calendar.
  • Fixed‑date observances like the International Day for Disaster Risk Reduction always occur on October 13 , regardless of weekday, which is why you’ll often see that listed even when Columbus Day falls on a different date.

In short:

  • If October 13 is the second Monday of October in a given year, it is the U.S. federal holiday of Columbus Day (and in many places also Indigenous Peoples’ Day).
  • Every year on the calendar date October 13, there are international and themed observances like the International Day for Disaster Risk Reduction and various “national day” style celebrations.