Why Does My Go Timezone Conversion Always Return UTC?

Understanding Timezone Parsing and Conversion

In the provided Go code snippet, the parseAndPrint function aims to parse a specific time and display it in the specified timezone. However, it always returns "[date] 05:00:00 0000 UTC" regardless of the chosen timezone. To resolve this issue, a deeper understanding of timezone parsing and conversion is essential.

Timezone Handling in Go

When parsing a time value, you are typically doing so in your current local timezone. However, timezone abbreviations are specific to the location from which you are parsing. If you need to parse times from different timezones, you must explicitly specify the appropriate time location or timezone offset.

The Problem with the Code

The issue in the provided code lies in the line where the test time is created using time.Date. This line sets the timezone of the test time to the system's local timezone, even though you supply a timezone parameter when parsing the input string. Therefore, converting the test time to UTC always results in the same offset as the local timezone.

Solution

To fix this, you need to create the test time using the provided timezone information. This can be done by loading the corresponding time location object using time.LoadLocation and then parsing the input string in that location using time.ParseInLocation. The resulting time will have the correct timezone offset.

Alternative Approaches

Depending on your specific requirements, you may consider alternative approaches for handling timezones and conversions:

• Normalize all times to UTC by converting them explicitly using the UTC method.
• Work exclusively with timezone offsets (e.g., "-05:00").
• Utilize Go's time.Location interface to load and parse times in specific timezones.

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