How to calculate late-night and overtime hours in Excel attendance sheets: Pitfalls of overnight shifts, 15-minute rounding, and exceeding 24 hours

Suppose that at the end of the month, you enter your start time, end time, and break time into an Excel attendance sheet ...

Creating VBA to Automatically Reflect Margin Trading Ratios in Excel

Last time, I updated the program that converts the "Margin Trading Balance by Stock" PDF published by JPX into Excel using Python.Since the PDF format changed in September 2026 and the previous ...

Excel Breaks a 40-Year Rule: Microsoft Lets One Cell Hold Multiple Values

Microsoft is changing a 40-year-old Excel rule by allowing a single cell to hold multiple values using new lists, arrays in cells, and nested arrays.