Microsoft is testing out a new =COPILOT function in Excel cells – it's in beta with improvements needed, but you can try it ...

Excel’s new COPILOT function uses AI to analyze, summarize, and generate content directly in the spreadsheet grid.

You can change the date & time format in Google Sheets & Excel Online using this guide. Use different date & time formats in spreadsheets.

How to return a sequence of dates in Excel Excel’s fill handle can generate a quick list of dates for you, but the list is static; you must create a new list if your needs change.