day.go

package main

import (
	"fmt"
	"time"
)

var (
	jaWeekdays = []string{"日", "月", "火", "水", "木", "金", "土"}
)

func jaWeekday(t time.Time) string {
	return jaWeekdays[t.Weekday()]
}

func heisei(t time.Time) int {
	return t.Year() - 2000 + 12
}

func main() {
	now := time.Now()

	fmt.Printf("平成%d年%d月%d日(%s)\n", heisei(now), now.Month(), now.Day(), jaWeekday(now))
}