Spreadsheet Day

Spreadsheet Day is observed every year on October 17. The day celebrates spreadsheet software and recognizes the release of VisiCalc, the world’s first electronic spreadsheet program, on October 17, 1979. Spreadsheets have become essential tools for organizing data, managing finances, performing calculations, and analyzing information.

History of Spreadsheet Day

Spreadsheet Day commemorates the release of VisiCalc, developed by Dan Bricklin and Bob Frankston for the Apple II computer. Introduced on October 17, 1979, VisiCalc transformed the way businesses, accountants, and individuals managed financial information and calculations.

The popularity of VisiCalc helped establish the Apple II as a practical business computer and paved the way for later spreadsheet programs such as Lotus 1-2-3, Microsoft Excel, and Google Sheets. Spreadsheet Day itself was founded in 2010 by spreadsheet expert Debra Dalgleish to recognize the importance of spreadsheet software and the people who use it every day.

Interesting Facts About Spreadsheet Day

• VisiCalc was the first widely successful electronic spreadsheet application.
• Many historians consider VisiCalc the first “killer app” because it significantly increased sales of the Apple II computer.
• Modern spreadsheets are used for budgeting, accounting, data analysis, scheduling, project management, and scientific research.
• Microsoft Excel remains one of the world’s most widely used spreadsheet programs.

How to Take Part in Spreadsheet Day

Celebrate Spreadsheet Day by learning a new spreadsheet skill or exploring features you have never used before, such as formulas, charts, pivot tables, or conditional formatting. You can also organize your personal budget, create a planner, or build a tracker for your hobbies or goals.

If you use spreadsheets at work or school, share helpful tips with coworkers or classmates, or try automating repetitive tasks to improve productivity. Spreadsheet Day is also a great opportunity to appreciate how these tools simplify everyday life.

When Is Spreadsheet Day in 2026?

Spreadsheet Day is observed on October 17 each year.

Observations