get beginning of today and tomorrow

today_tomorrow.go

package main

import (
	"fmt"
	"time"
)

func main() {
	t := time.Now()
	y, m, d := t.Date()

	today := time.Date(y, m, d, 0, 0, 0, 0, t.Location())
	tomorrow := today.AddDate(0, 0, 1)
	fmt.Println(today)
	fmt.Println(tomorrow)
}