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What is the formula that excel uses to convert number to datetime?


Validate decimal numbers in JavaScript - IsNumeric()How to return only the Date from a SQL Server DateTime datatypeHow to create Excel (.XLS and .XLSX) file in C# without installing Ms Office?Stop Excel from automatically converting certain text values to datesShould I use the datetime or timestamp data type in MySQL?Converting string into datetimeHow do I calculate the date six months from the current date using the datetime Python module?Return empty cell from formula in ExcelHow to print a number with commas as thousands separators in JavaScriptHow to make an unaware datetime timezone aware in python






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When I enter a number (43547.44114)in an excel cell with a "General" format, then change the cell format to "Date" it automatically convert it to "3/23/2019 10:35 AM", I want to know the formula excel uses to do this conversion, and the reverse formula (DateTime to number) please.










share|improve this question




























    -1















    When I enter a number (43547.44114)in an excel cell with a "General" format, then change the cell format to "Date" it automatically convert it to "3/23/2019 10:35 AM", I want to know the formula excel uses to do this conversion, and the reverse formula (DateTime to number) please.










    share|improve this question
























      -1












      -1








      -1








      When I enter a number (43547.44114)in an excel cell with a "General" format, then change the cell format to "Date" it automatically convert it to "3/23/2019 10:35 AM", I want to know the formula excel uses to do this conversion, and the reverse formula (DateTime to number) please.










      share|improve this question














      When I enter a number (43547.44114)in an excel cell with a "General" format, then change the cell format to "Date" it automatically convert it to "3/23/2019 10:35 AM", I want to know the formula excel uses to do this conversion, and the reverse formula (DateTime to number) please.







      excel datetime numbers






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      share|improve this question




      share|improve this question










      asked Mar 24 at 20:54









      user3044965user3044965

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          1 Answer
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          Excel stores dates as the number of days from Jan 1 1900, plus a fractional proportion for the extra hours etc But can be Jan 1 1904 - see below.



          See http://www.cpearson.com/excel/datetime.htm



          And



          https://support.microsoft.com/en-in/help/214330/differences-between-the-1900-and-the-1904-date-system-in-excel






          share|improve this answer

























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            1 Answer
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            active

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            oldest

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            Excel stores dates as the number of days from Jan 1 1900, plus a fractional proportion for the extra hours etc But can be Jan 1 1904 - see below.



            See http://www.cpearson.com/excel/datetime.htm



            And



            https://support.microsoft.com/en-in/help/214330/differences-between-the-1900-and-the-1904-date-system-in-excel






            share|improve this answer





























              0














              Excel stores dates as the number of days from Jan 1 1900, plus a fractional proportion for the extra hours etc But can be Jan 1 1904 - see below.



              See http://www.cpearson.com/excel/datetime.htm



              And



              https://support.microsoft.com/en-in/help/214330/differences-between-the-1900-and-the-1904-date-system-in-excel






              share|improve this answer



























                0












                0








                0







                Excel stores dates as the number of days from Jan 1 1900, plus a fractional proportion for the extra hours etc But can be Jan 1 1904 - see below.



                See http://www.cpearson.com/excel/datetime.htm



                And



                https://support.microsoft.com/en-in/help/214330/differences-between-the-1900-and-the-1904-date-system-in-excel






                share|improve this answer















                Excel stores dates as the number of days from Jan 1 1900, plus a fractional proportion for the extra hours etc But can be Jan 1 1904 - see below.



                See http://www.cpearson.com/excel/datetime.htm



                And



                https://support.microsoft.com/en-in/help/214330/differences-between-the-1900-and-the-1904-date-system-in-excel







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Mar 24 at 21:13

























                answered Mar 24 at 21:04









                Solar MikeSolar Mike

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                2,8272718





























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