How to Convert a Time Offset String to a Time.Location Object in Go?

Converting Time Offset to Location/Timezone in Go

When working with time zones and offsets, it's common to encounter scenarios where you need to convert a raw time offset, represented as a string, into a usable location object in Go. This can be achieved effortlessly using the methods provided by the time package.

Suppose you have obtained an arbitrary time offset, such as " 1100". To create a time.Location object representing this offset, simply use the FixedZone function as follows:

loc := time.FixedZone("UTC+11", +11*60*60)

This function creates a location with the specified name and offset in seconds.

To associate the time with this newly created location, use the In method:

t = t.In(loc)

This operation modifies the time t to reflect the specified location and updates its offset accordingly.

Here's an example that demonstrates the conversion and subsequent output of the time in different contexts:

package main

import (
    "fmt"
    "time"
)

func main() {
    loc := time.FixedZone("UTC+11", +11*60*60)
    t := time.Now()

    // Output the original time and location
    fmt.Println(t)      // Output: 2023-09-13 18:37:08.729331723 +0000 UTC
    fmt.Println(t.Location()) // Output: UTC

    // Apply the new location to the time
    t = t.In(loc)

    // Output the modified time and location
    fmt.Println(t)      // Output: 2023-09-14 05:37:08.729331723 +1100 UTC+11
    fmt.Println(t.Location()) // Output: UTC+11

    // Output the UTC equivalent of the modified time
    fmt.Println(t.UTC()) // Output: 2023-09-13 18:37:08.729331723 +0000 UTC
    fmt.Println(t.Location()) // Output: UTC+11
}

This code showcases how you can convert a time offset into a location object and apply it to a time to obtain accurate representations with respect to different time zones.

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