How to convert cells to the date format? Open your excel spreadsheet. Select all the cells you want to modify, and right-click on them. Select Format Cells. Go to the Number tab. In the Category list, ...

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Convert your date to hex format by dividing it by 16. To calculate the hex value of your number, you need to repeatedly divide it by 16 and multiply the remainder by 16 each time.

Think of each format like a different language, with some only understood by specific platforms and applications. To access any given file, you may need to convert it to a new format.