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())

}