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Count days between client visits with a simple AI-powered formula

Are you struggling to calculate the number of days since your clients' last visit using your spreadsheet?

3 min readMicrosoft Excel | Help & Support with your Formula, Macro, and VBA problems | A Reddit Community

**Our Take: The Real Problem Isn't Your Formula, It's Your Tool**

Manny631's frustration is familiar to anyone who has tried to make traditional spreadsheets do something they weren't designed for. The request is simple: count days between client visits using a row of nine date columns, with blanks allowed, in chronological order. Google failed. ChatGPT failed. The formulas returned weird dates or wonky numbers. The user is a self-described Padawan of Excel, but the tool isn't helping them level up. Here's our plain opinion: this isn't a skill gap. It's a tool gap.

Traditional spreadsheets treat dates as serial numbers, blank cells as zeros, and logic as something you build from scratch with nested IF statements. For a row where columns 1 through 3 have dates and columns 4 through 9 are empty, the user needs to find the last non-blank cell, subtract it from today's date, and handle the blank scenario. That's a multi-step formula involving functions like LOOKUP, MAX, or INDEX-MATCH, plus error handling for rows where no dates exist yet. Getting it wrong produces numbers that look like dates, because Excel interprets a raw day count as a date serial number unless you format the cell explicitly. The user tried both column names and cell ranges, and neither worked, because the logic itself is brittle.

What Manny631 needs is a tool that understands intent, not syntax. An AI-native spreadsheet should let you write in plain English: "Show me the days since the most recent date in this row, ignoring blanks." The formula should generate itself, handle edge cases, and display the result as a number, not a date. The bonus question, listing clients with a year or more since their last visit, is equally straightforward in natural language: "List clients where the days-since value is 365 or more." A traditional spreadsheet requires a pivot table, a helper column, or a FILTER function. An AI-powered tool should return that list instantly, with no manual setup.

This is what we mean when we say data management should be accessible. Manny631 is not asking for rocket science. They are asking for a tool that respects their time and their data's structure. The fact that Google and ChatGPT both failed is not a user failure, it's a product failure. Legacy spreadsheets demand that you think like a programmer. A future-focused solution should think like a human.

From Microsoft Excel | Help & Support with your Formula, Macro, and VBA problems | A Reddit Community

I have a spreadsheet that contains a table. In this table there are many columns, but there are 9 that I am referencing for this. They all contain either dates or are blank, and from left to right in the row it is ALWAYS in chronological order. Think of them as dates a client comes in. Example may be column 1 has 2/4/2023, column 2 has 3/5/2024, column 3 has 5/25/2025, and columns 4 through 9 are blank (but won't be forever). I want to add another column that shows the amount of days since the most recent date they…

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