Why Does My Go Timezone Parsing Always Return UTC?

Understanding Timezone Parsing in Go

In Go, handling timezones can occasionally lead to unexpected behavior. Let's delve into a common issue encountered while parsing timezones using custom time formats.

Issue: Consistent Timezone Output Regardless of Input

The provided code snippet defines a parseAndPrint function that aims to parse a time represented as "05:00:00" within a specific timezone and then print the result in UTC. However, the resultant time remains unchanged, regardless of the timezone specified, displaying "[date] 05:00:00 0000 UTC" every time.

Understanding the Problem

The root cause lies in how the time is parsed using time.Parse within the parseAndPrint function. The current time is fetched with time.Now() and passed as an argument to time.Parse, which interprets the input string according to the specified timezone abbreviation.

However, the parsing is done in the system's local timezone, not the desired timezone specified. This discrepancy leads to incorrect parsing and a consistent output in UTC, irrespective of the intended timezone.

Solution: Correct Timezone Handling

To properly handle timezones, it's crucial to parse the string representation of the time in the specified timezone using a correct time.Location instance. This involves the following steps:

• Load the desired timezone from the timezone database using time.LoadLocation.
• Create a time.Time object for that timezone using time.ParseInLocation.
• Convert the time to UTC using test.UTC().

By incorporating this approach, the code would correctly parse and print the provided time in the desired timezone, accounting for the time differences between timezones.

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