Скачать или смотреть Converting Excel Decimal Dates to time.Time in Go

Learn how to convert Excel's decimal date format into Go's `time.Time` with this step-by-step guide. Perfect for Golang developers dealing with Excel data!
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Converting Excel Decimal Dates to time.Time in Go: A Simple Guide

When working with Excel files in Go, it's common to face the challenge of interpreting data formats that might not be directly compatible with Go's time.Time type. One such situation is when a date-time column is represented as a decimal value. For instance, you might come across a number like 44531.553587963, which corresponds to the date 12/01/2021 13:17:10. If you're wondering how to convert this decimal representation into a time.Time object in Go, you’ve come to the right place.

Understanding Excel's Date Format

Before diving into the solution, it's essential to grasp how Excel represents dates:

Decimal Representation: Excel stores dates as a number representing the number of days since a base date. For most versions of Excel, this base date is December 30, 1899.

Unique Quirk: There's a notable quirk in Excel's date handling: it mistakenly assumes that 1900 was a leap year, which shifted all subsequent dates by one day. To work around this, you need to adjust your calculations accordingly.

This leads us to the need for a conversion method in Go that accurately interprets these decimal values into the proper time.Time format.

Steps to Convert Excel Decimal Dates

Here’s a straightforward method to convert the decimal representation into Go’s time.Time.

Initialize the Decimal Value: This is the value you get from your Excel sheet. For example:

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Define the Epoch: Recognize that Excel's epoch begins on December 30, 1899.

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Calculate the Duration: Convert the decimal days into a time.Duration and add it to the epoch.

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Print the Result: Now you can display the converted time.

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Code Summary

Here's a consolidated version of the above steps in code:

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Conclusion

By following these steps, you can seamlessly convert Excel decimal date representations into time.Time objects in Go. Understanding the intricacies of how Excel handles dates is key in ensuring your data is parsed correctly. With this method, you can confidently process date-time data from Excel in your Go applications.

Happy coding!