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Insert Julian dates (Functions) - Microsoft Support
网页Learn how to use Excel functions to insert or convert a date to a Julian date, which is a combination of the current year and the number of days since the beginning of the year. See examples of different formats and formulas for Julian dates.
Insert or delete rows and columns - Microsoft Support
网页Learn how to insert or delete rows and columns in Excel to organize your worksheet better. Find out the column and row limits, formatting options, and keyboard shortcuts for this task.