Since nowadays we have more advanced modern communications equipment, you can make a phone call to a friend thousands of miles away and offer blessings on the Mid-autumn night, or put your innermost feelings in the congratulation cards and send it to your families and friends in the distance several days in advance.
In the case of congratulations on an elder's birthday, apart from being particular about clothing, you must bring a gift which contains the meaning of health and longevity, such as an exquisitely designed cake or a memorial gold congratulation card.