Why Does Go's `time.Now()` Show a 'm= ' Token, and Should the Output Be Standardized?

Unexpected Output from time.Time: "m= " Token

Problem Overview

A Go programmer observed a discrepancy in the output of the time.Now() function between their code and a tutorial video. The expected output was a standard time format, but their result contained an additional "m= " token. The question raised is why this difference occurs and whether a standardized format should be returned by default.

Technical Explanation

Prior to Go version 1.9, the time.Time struct did not include support for a monotonic clock. With the release of Go 1.9, this support was added, resulting in the expanded output now observed. This "m" field represents the monotonic clock offset in microseconds.

Expected Behavior

For practical use cases, it is recommended to always format time output using the Format function rather than displaying the raw data. This ensures more meaningful and stable results, protecting against potential future changes to the underlying type.

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