Go: error getting difference between two time

I have one headache with time. I have above code:

// ticker := time.NewTicker(time.Minute * 1)
    ticker := time.NewTicker(time.Second * 1)
	defer ticker.Stop()

	// new version
	for t := range ticker.C {

		// get duration

		go func() {
			now := time.Now()
			const layout = "2006-01-02 15:04:05"

			endDateStr := fmt.Sprintf("%04d-%02d-%02d 23:45:00", now.Year(), now.Month(), now.Day())
			endDate, _ := time.Parse(layout, endDateStr)

			duration := endDate.Sub(now)

			drHours := (duration.Minutes() - math.Mod(duration.Minutes(), 60)) / 60
			drMinutes := math.Mod(duration.Minutes(), 60)
			//fmt.Println(duration.Hours())

			fmt.Println(now)
			fmt.Println(endDate)

			durStr := fmt.Sprintf("%d:%d:00", uint64(drHours), uint64(drMinutes))
			fmt.Printf("duration: %s\n", durStr)
		}()
		fmt.Println(t)
	}

At my comp now and endDate have different time zone:

2015-11-12 10:33:53.9298552 +0500 UZT  // now
2015-11-12 23:45:00 +0000 UTC          // endDate

That's why get wrong duration. How can I set same time zone to both of them ?
And a problem again, pay attantion when ticker tik first and second duration has differens 5 hour. Why those problems have occured. What am I doing wrong? Do you have any idea ? Made me happe any hint from you ?

To avoid DST (Daylight Savings Time) and other errors use UTC for the duration. For example,

package main

import (
	"fmt"
	"math"
	"time"
)

func main() {
	ticker := time.NewTicker(time.Second * 1)
	defer ticker.Stop()

	for t := range ticker.C {
		go func() {
			now := time.Now().UTC()

			const layout = "2006-01-02 15:04:05"
			endDateStr := fmt.Sprintf("%04d-%02d-%02d 23:45:00", now.Year(), now.Month(), now.Day())
			endDate, _ := time.Parse(layout, endDateStr)

			duration := endDate.Sub(now)
			drMinutes := math.Mod(duration.Minutes(), 60)
			drHours := (duration.Minutes() - drMinutes) / 60

			fmt.Println(now)
			fmt.Println(endDate)

			durStr := fmt.Sprintf("%d:%d:00", uint64(drHours), uint64(drMinutes))
			fmt.Printf("duration: %s\n", durStr)
		}()
		fmt.Println(t.UTC())
	}
}

Output:

2015-11-12 06:41:40.123232567 +0000 UTC
2015-11-12 06:41:40.123409615 +0000 UTC
2015-11-12 23:45:00 +0000 UTC
duration: 17:3:00

peterSO's answer is right. And I solved the problem with above code:

endDate := time.Date(now.Year(), now.Month(), now.Day(), 23, 45, 0, now.Nanosecond(), now.Location())

If somebody come accross with a problem like that they can choose ine of them.