著者：相澤裕介 Excel 関数 Excel Excel 使い方 目次 数値から日付データを作成する関数DATE 「生年月日」から「誕生日」だけを取り出すには？

Excel DATEVALUE is a Date and time function, and its purpose is to converts a date in the form of text to a serial number. Learn how to use it.

Excel offers several easy ways to calculate expiry dates. This post explores different ways to automate expiry date calculations in Excel.

Excel’s Date & Time functions ease the workload for bookkeepers, project planners, HR departments, and other jobs where time is money. The four functions covered here—ISOWEEKNUM, WEEKNUM ...

On Monday, the company announced that its Copilot AI is now available as an Excel function for Microsoft 365 insiders. That means you can add COPILOT to a formula and then use natural language in a ...

If you need a monthly or yearly balance for revenue transactions in Microsoft Excel, you're in luck because both are easy! Here's how to find the totals you need.

If you have a volatile time or date function in your spreadsheet, meaning it updates automatically with your computer's time and date, you can turn it into a frozen time or date.