给定当前时间（以golang为分钟），以UTC计时的最佳方式

I have time of the same day in minutes (ie, hours * 60 + minutes) as input ,need to convert it into time.Time here is my attempt to do the same .

Example

Input: 780
Output : 2017-01-29 13:00:51.992871217 +0000 UTC

Code

func MinutesToTime(minutes int) time.Time {
          t := time.Now().UTC() //may be cached  
          h, m, _ := t.Clock()
          diff := minutes - (h*60 + m)
          t = t.Add(time.Duration(diff) * time.Minute)
          return t
}

Doubt

1. Is there any functions that time package exposes that might help me optimize this
2. Should i be using gettimeofday() system call directly
3. Would trying to implement vDSO be an overkill , vDSO implementation for only amd64 is found in go source code

PS The 59 sec err is acceptable as minute is my lowest granularity

package main

import (
    "fmt"
    "time"
)

func main() {
    fmt.Print(MinutesToTime(780).UTC())
}

func MinutesToTime(m int64) time.Time {
    return time.Unix(time.Now().Unix()/86400*86400+m*60, 0)
}

% go run test.go                                                                                                         
2017-01-29 13:00:00 +0000 UTC%