Example showing use of Waitgroups and with the time.After channel. Remove the "go" call to have all calls to UpdateSchedulesReport run sequentially otherwise they run concurrently

Go routines.go

package main

import (
	"fmt"
	"sync"
	"time"
)

func main() {
	var w sync.WaitGroup
	w.Add(3)
	go UpdateSchedulesReport(&w)
	go UpdateSchedulesReport(&w)
	go UpdateSchedulesReport(&w)
	w.Wait()
	fmt.Println("all over!")
}

func UpdateSchedulesReport(w *sync.WaitGroup) {
	fmt.Println("waiting...")
	ch := time.After(5 * time.Second)
	for {
		select {
		case <-ch:
			fmt.Println("time is ", time.Now())
			w.Done()
			break
		}
		break
	}
}