Name Days

The Garruw live up to 300 years, and every 50 years they celebrate their birthdays with particular pomp and ceremony. As this is considered to be a grand achievement, this is one of the occasions in a Garruw's life in which they might be allowed to extend their name.

History

Ancient Garruw considered the number 50 to be a sacred number. As such, in the old days when it wasn't such a guarantee that a young one would make it to 50 or 100, they chose to celebrate this particular milestone as one of the great achievements, worthy of adding to one's name. Even though life expectancy has gone up, the practice continues to the modern era as a great family tradition.

Execution

There is a small party to start, with food and small gifts for the attendees. They celebrate while the Garruw being honored is carving their new name stone. At an appointed hour, the Garruw who is being honored will give a short speech. This is usually meant to honor those in their lives, and also explain the choice of the sound they wish to add to their name.
The highest ranking Garruw in attendance will then pronounce a blessing over the honoree. This is usually a member of the Hrrmengaan, but sometimes not.
If this is the person's 50th birthday, the party is closed with a flight as high as they can manage, to show off their skill.

Components and tools

The fun part is the little gifts given to guests. These should not be meager trinkets, but at the very least well-made, and in most cases should be gifted with each particular person in mind, as a specific thank you to them for their attendance (and also ostensibly for the support they've given to the honoree over the last 50 years).
The practical part is the name stone to be etched. You are meant to carve a new one with your chosen name each time one of these ceremonies occurs.
In the modern era, it's also customary to sign the documents to formally change a name for government records at the same time as the party.

Participants

The Garruw in question is of course in attendance. Beyond that, there are a number of different ways that the various regions might celebrate, requiring different people at each. Some expect a garruw's parents to be in attendance. A few areas have strict limits as to how many people might attend.
It is expected but not required that a member of the Hrrmengaan will be present at a Name Day. Originally this was so they might offer approval of the chosen name, but eventually their role became the one to sign off on government documents to formally note the change in name.

Observance

The ceremony is intended to take place on exactly the day of the birthday in question, and it is considered bad luck to hold it on another day (although sometimes these things do happen). Typically it is held in the evening.