Spreadsheet Day 17 Oct 2023

Whether they"re a pivot table pro or an entry-level novice, spreadsheet users worldwide have one person to thank. Dan Bricklin released the first electronic spreadsheet programme on this day in 1979, a date now commemorated as Spreadsheet Day. The day celebrates the sophisticated grids that have reshaped businesses from accounting and engineering to education and project management. Like the spreadsheets that empower modern data handling, ancient civilisations also sought innovative ways to record and track the world around them.

© George Hall/Alamy

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Today in History

Widespread and long-eared
17 Oct 2024Kochia, Hitachi, Ibaraki Prefecture, Japan
17 Oct 2025Rock River Falls, Upper Peninsula, Michigan, United States

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Heads together
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30 May 2025Little Pigeon River, Great Smoky Mountains National Park, United States
22 Oct 2023Red grouse
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23 Dec 2023Festivus
15 Mar 2025Ides of March
11 May 2025Yoho National Park, British Columbia, Canada
9 Mar 2024Bisti/De-Na-Zin Wilderness, New Mexico, USA
A legend sprung from the ground
12 Feb 2025Celebrating Charles Darwin
5 Apr 2025Grand National
Regal Radiance
19 Dec 2023Castle Square, Warsaw, Poland
24 Aug 2025Notting Hill Carnival
1 Jun 2025World Reef Awareness Day
12 Oct 2023Palouse region, Idaho, USA
20 Jul 2025Moon Day
A public restroom or a tourist spot?
A braided river
Whats a distaff?
26 May 2024Methow Valley, North Cascades, Washington, USA
14 Aug 2025Cable car station on Piz Nair mountain, Graubünden, Switzerland
Like paint on a canvas
5 Jan 2026A herd of impalas, Londolozi Game Reserve, South Africa
27 Sep 2023Via Krupp, Capri, Italy