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  2. Using SpreadsheetGear for .NET you can do this: worksheet.Cells ["A1"].Value = DateTime.Now; This will convert the DateTime to a double which is the underlying type which Excel uses for a Date / Time, and then format the cell with a default date and / or time number format automatically depending on the value.

  3. However date columns have dates in incorrect format eg; 02/092015 or 02/90/2015 or 2015. So checking 20,000 records one by one would be very lengthy. I tried to count / but it didn't work. It changes the format of column to date. I was looking for some formula which can check the format and maybe color the cell or something like it.

  4. Go to the language settings in the Control Panel, then Format Options, select a locale and see the actual date format for the chosen locale used by Windows by default. Yes, that timestamp format is locale-sensitive. Excel uses those formats when parsing CSV. Even further, if the locale uses characters beyond ASCII, you'll have to emit CSV in ...

  5. How to convert Excel date format to proper date in R

    stackoverflow.com/questions/43230470

    Converting date from MS Excel 2010 to R's Date format. 0. Converting Date from properly from excel to R. 1.

  6. How to convert a date in Excel to ISO 8601 format

    stackoverflow.com/questions/27388761

    The basic function is: =TEXT(A1,"yyyy-mm-ddThh:MM:ss") Use this to convert your Excel date columns to separate ISO 8601 date columns. Next, copy the ISO 8601 columns onto the originals (paste special: paste values only). Delete the calculated ISO 8601 columns which now have garbage in them because Excel sucks at ISO 8601 dates.

  7. Excel will honor your system settings and display the date according to your system's regional and language setting. Use only the date formats with an asterisk and Excel will adjust the date display to the regional settings. If you hard code a date format and not use an asterisk format, THAT is where the trouble starts. –

  8. The following formula will parse an ISO timestamp, again WITHOUT the time zone: =DATEVALUE(MID(A1,1,10))+TIMEVALUE(MID(A1,12,8)) This will produce the date in floating point format, which you can then format as a date using normal Excel formats. answered Oct 11, 2014 at 14:47. sigpwned.

  9. first, on a blank cell somewhere on the sheet, type the number 1. then, right click, copy. next, highlight the entire column of dates. right click, paste special, multiply. all of the dates will have turned into numbers. next, highlight the date column, and apply the date format that you want.

  10. A true date is a number, specifically the number of days since 1/1/1900. You can format this number any way you want. There is no way via formula that will allow you to test the format of a cell. The best method is to format the cells prior to entering the date and Excel will then take any valid date and display it in the format you choose.

  11. The [$-409] is a locale code, given in hexadecimal. Prefixing a date with a certain locale code determines what is shown when you use the various date time format codes. For example using the date. November 28, 1973 11:28:13 AM. as an example for the following table: