Convert UTC to JST with Carbon

package main

import (
    "fmt"
    "time"

    "github.com/uniplaces/carbon"
)

func main() {
    tokyo := "Asia/Tokyo"
    // Parse date time from string
    startAt, _ := time.Parse("2006-01-02T15:04:05Z", "2019-10-07T06:54:08Z")
    endAt, _ := time.Parse("2006-01-02T15:04:05Z", "2019-10-07T06:54:08Z")
    // UTC to JST
    location, _ := time.LoadLocation("Asia/Tokyo")
    startAt = startAt.In(location)
    endAt = endAt.In(location)
    fmt.Println(startAt, endAt)
    // Convert to date range
    start, _ := carbon.CreateFromDate(startAt.Year(), startAt.Month(), startAt.Day(), tokyo)
    end, _ := carbon.CreateFromDate(endAt.Year(), endAt.Month(), endAt.Day(), tokyo)
    fmt.Println(start.StartOfDay(), end.AddDay().StartOfDay())
    // Convert to UTC date range
    fmt.Println(start.StartOfDay().In(time.UTC).String(), end.EndOfDay().In(time.UTC).String())

}