Go 言語の time 関数を使用してスケジュール カレンダーを生成し、テキスト メッセージや電子メール リマインダーを生成するにはどうすればよいですか?

type Calendar struct {
    EventName string
    EventTime time.Time
}

var events []Calendar

currentTime := time.Now()

if eventTime.After(currentTime) {
    newEvent := Calendar{
        EventName: "Meeting",
        EventTime: eventTime,
    }
    events = append(events, newEvent)
}

import (
    "fmt"
    "net/smtp"
)

func SendSMS(message string, phoneNumber string) error {
    // TODO: 配置短信发送服务

    from := "your.email@example.com"
    password := "your_password"

    msg := "From: " + from + "
" +
        "To: " + phoneNumber + "
" +
        "Subject: Schedule Reminder

" +
        message

    err := smtp.SendMail("smtp.example.com:587",
        smtp.PlainAuth("", from, password, "smtp.example.com"),
        from, []string{phoneNumber}, []byte(msg))

    if err != nil {
        return fmt.Errorf("failed to send SMS: %w", err)
    }
    return nil
}

func ScheduleSMSReminders() {
    for _, event := range events {
        message := fmt.Sprintf("Reminder: You have a meeting at %s", event.EventTime.Format("2006-01-02 15:04"))
        phoneNumber := "+1234567890"
        err := SendSMS(message, phoneNumber)
        if err != nil {
            fmt.Printf("failed to send SMS for event %s: %s
", event.EventName, err)
        } else {
            fmt.Printf("successfully sent SMS reminder for event %s
", event.EventName)
        }
    }
}