Greetings SMS
SMS text messages for many special days are available here. These are good for simple cell phones. As the modern world is depending on Smartphones you can find lot of SMS text messages in the internet that are accessible through them. Apps like Viber, Snapchat, Whatsapp and other ones are specially made for this texting purpose.
They offer Emoji's too to select and send to your friends. Check them in the Google Play store. First check with your friends which IM Messenger App they are using. Then you too can get it and can install it in your device to send them greeting messages for free.