Birthdays within the Imperial cult

The imperial customs of child rearing does not allow to convey any rights and privileges (or even assign a name) to a child that did not reach the age of one (formerly - two) years. This is a remnant of older and harsher time, when children often did not survive their first year of life. 
Upon being born, the child is given the name Kind - literally "child", and his birthday is recorded at the local magistrate. When he reaches the age of one, a grand ceremony is hosted by the parents. It consists of a ritual feast, a votive offering to God or the patron emperor of the father in gratitude for the child's survival, and the adornment of a newly accepted family member with a name and a patron, both recorded at the magistrate. The name and the patron are always picked by the father, as he is considered to hold the power over the household. 
A few words must be said about the patron. The imperial cult is a peculiar mix of monotheism and ancestor veneration. Emperors (nominally - all, but in practice only those not damned and consigned to oblivion) are posthumously elevated to a semi-divine position as so-called "God's servants and advisors", and each is assigned as a patron to certain craft, activity, or trade. The patron is usually picked with the father's ambitions for the child in mind - this is why, say, Eberhard-Friedrich, patron of the Imperial guard, is a common pick for youngest sons. When a patron is picked, a ritual is carried out, consecrating the child to the chosen emperor. This appends the emperor's name to the child's own - turning, say, Karl Wilhelm von Egbertsburg to Karl Wilhelm Eberhard-Friedrich von Egbertsburg - and legally changes the child's birthday to the day of his patron's veneration. After the festivities the child is ceremonially allowed to hold a sword in the magistrate's possession - symbolizing his or her belonging to the imperial nation of free-born warriors.
Upon each patron day every person consecrated to him celebrates their new birthday. The procedure is communal in nature and consists of a common prayer, a common procession with donating votive offerings to the patron's shrine or temple, and either a distribution of largesse for those who can and are willing to afford it or a private celebration according to one's own preferences. Curiously, the hallmarks of the child's age - the age at which one can be betrothed, married, exercise full citizenship or be called to answer for crimes and misdeeds - are only tracked by the patron veneration days after the first birthday.