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If you want to know what serial number represents a certain date or time displayed in a cell, you can do this in two ways. 99999 is 23:59:59.Įxcel stores dates and times as decimal numbers comprised of an integer representing the date and a decimal portion representing the time. 99999, that represent a proportion of the day where.
Times are stored in Excel as decimals, between. While you would expect Excel to remember the day, month and the year for a date, that's not how it works.Įxcel stores dates as sequential numbers and it is only a cell's formatting that causes a number to be displayed as a date, time, or date and time.Īll dates are stored as integers representing the number of days since January 1, 1900, which is stored as number 1, to Decemstored as 2958465. Excel date format not working - fixes and solutionsīefore you can take advantage of powerful Excel date features, you have to understand how Microsoft Excel stores dates and times, because this is the main source of confusion.