What does now() mean in excel

In Excel, now() is a function used to return the serial number corresponding to the current date and time. If the cell is formatted as "General" before entering the function, the result will be formatted as a date.

#Microsoft Excel can store dates as serial numbers that can be used in calculations. By default, the serial number for January 1, 1900 is 1 and the serial number for January 1, 2008 is 39448 because it is 39448 days from January 1, 1900. Microsoft Excel for the Macintosh uses an alternative default date system.

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