Why is the '2006-01-02' Layout Used for Time Formatting in Go?

Time Formatting in Go: Understanding the '2006-01-02' Layout

When using the time.Format function to format a time value, specifying the layout allows customization of the output representation. However, the meaning of specific layout formats may not be immediately apparent.

In the case of the '2006-01-02' layout, the documentation states that any layout can be used without specifying the meaning of the '2006', '01', and '02' components.

To understand the layout, we refer to the reference time provided in the documentation:

"Jan 2 15:04:05 2006 MST"

The components of the reference time correspond to the following positions in the layout string:

• '2006': Year
• '01': Month (as a decimal number, padded with zeros)
• '02': Day of the month (as a decimal number, padded with zeros)

Therefore, the '2006-01-02' layout formats the time value as follows:

• Year (as a decimal number)
• Month (as a two-digit decimal number)
• Day of the month (as a two-digit decimal number)

For example, formatting a time value representing "January 2, 2017" using the '2006-01-02' layout would result in "2017-01-02".

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