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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17 Aug 2024International Lighthouse and Lightship Weekend
5 Jul 2024Noah Beach, Queensland, Australia
14 Sep 2023Przewalskis horses, Hustai National Park, Mongolia
1 Sep 2025Rock layers in Zumaia, Basque Country, Spain
28 May 2025World Otter Day
Remember, remember…
17 Jan 2024Bavarian Forest National Park, Germany
24 May 2025European Day of Parks
2 Dec 2023Angkor, Cambodia
21 Jan 2025Squirrel Appreciation Day
Dare to delve into this dense swamp
Today, a nation was born
24 Apr 2025Spire Cove in Kenai Fjords National Park, Seward, Alaska, United States
29 Apr 2025Garden at Château de Villandry, Loire Valley, France
Teddy bears of the sea
27 Jan 2024Saint Paul Winter Carnival
15 Jul 2025Perseid meteor shower over Nevada, United States
Life on the lake
23 Jul 2025Vatican City, Rome, Italy
16 Jul 2024Festival of British Archaeology
King of the ocean
27 Mar 2024World Theatre Day
27 May 2024Hay Festival
16 Jan 2025Pinnacles National Park, California, United States
Rolling hills and charming villages
A touch of magic
4 Aug 2025Great grey owls in their nest, Finland
19 Oct 2024International Archaeology Day
25 Dec 2024Merry Christmas!
10 Mar 2024Mothering Sunday