Check Date expire android app

    //Note: Months are 0-based. January = 0, December = 11.

        GregorianCalendar expDate = new GregorianCalendar(2021, 6, 5); //mo// midnight

        GregorianCalendar now = new GregorianCalendar();

        boolean isExpired = now.after(expDate);

        Log.i(TAG, "gotoMain: " + isExpired);

        ;

        if (!isExpired) {

            Intent intent = new Intent(WelcomeActivity.this, MainActivity.class);

            startActivity(intent);

            WelcomeActivity.this.finish();

        }