Famely Life in Dark Eternity.
Unsurprisingly the family is still the basic social unit within the Eternity complex. The opinion that while hard times come and go, family remains. Your family will always accept you and love you irregardless of what you have done and this support network is very important indeed for the day to day horrors, stresses, and trauma faced by citizens. However, the definition of the family has always been a contentious issue. Generally speaking, when people of the Eternity complex refer to family they refer to their bloodline relatives including their parents, uncles and aunts, grandparents, and other immediate relations. Quite often, due to the Mixing, more than one family can claim ties with each other and meta-families known as clans emerge (which as a note is very common of the Atlantians , and even humans to some note). However, this is not the Eastern conception of the clan, with honour and due ceremony, but more casual and social rather than literal.
The basic interactions between the family are essentially the same as they were in our own time or at the dawn of time. Teenagers are always and will always be a little resentful of parental control, siblings fight with each other, in-laws drop by for visits, and so forth. The major difference is that with the high rate of mortality on Earth now, the family tends to be a closer unit than it ever was in the past. An unspoken but important point is the continuation of the family line. People understand rather implicitly that one day everything will be better, and they want an unbroken chain of family through the Second Dark Age (or third depending on perspective) to prove their family is truly worthy of the new world. It has not yet gone as far as having any formal family honour, but it is approaching that as children want to carry on the name of the family without disgracing it, because word of a disgraced family gets around quickly.
Family gatherings tend to be a generally happy time, although this varies a lot. However, most arguments and such are dealt with quickly and decisively because of the high risk that they may never see said relative again.
All families have a rite of passage celebration for their children. This typically marks the time when the child is officially recognized as a young adult and they are told in fairly clear terms to put away childish things while gaining new freedoms. The mostly standard of these is a Becoming party on the child's 16th birthday, which consists of a happy celebration of the childhood and lots of roasting by various members of the family, followed by gift-giving. The gifts tend to be more permanent in nature (as opposed to credits), things such as jewelry, weapons, and other material assets. It's quite a day for a young adult and a good one stays with him for life, especially since helpful advice for the future is given on this day (usually through cards and letters).
Marriages are always a happy time. Typically one of the spouses takes the other's name and s/he is formally adopted into that family while retaining ties with their original family. Marriage ceremonies vary by the couple but they generally religious, and the basic ceremony has not changed much in 300+ years (aside form non-human races which have there own remberd ceremonies though with some parts of cultures lost through time it tends to be a mixture or more then one base ceremonies put rag-tagly together). Often families will 'customize' the basic ceremony and add their own touches, which can often cause anything from laughter to blood feuds. The sombre ceremony itself is followed by a usually wild reception which starts with dinner and ends with... well, anything is possible. :) The bride and groom are roasted throughout the occasion and bets are made on child appearances in the future. Often the best man and maid of honour will gang up and create a video presentation of the lives of their respective friends which can be anything from touching to hilarious, and usually both. In general, people are slower to marry but when they do they generally feel it is the right person and divorces are as a rule surprisingly uncommon, although convenience marriages and political marriages still exist. Bells are often given by the parents of the bride and groom, usually ornate ones as income allows. Usually the parents of the prospective couple get together and get two unique bells commissioned and give them to their children during the ceremony, where they ring as one. Of course, each couple's tastes are taken into consideration and therefore trying to pin down a "generic" ceremony is impossible given the happiness that any marriage promotes, a rare gift on Earth now.
Funerals on the other hand are a far too common tragedy. Generally, grieving is a three day process. The first night is typically a party of some sort in the departed's honour, be it a bar crawl or a formal evening event. This is done initially so that emotions can be released in an acceptable fashion, including ones such as anger, frustration, despair, and other negative emotions. The departed is considered to be there still, and plates of food and drinks are still given to him (usually a pictorial representation). The second night is dedicated to solemn memory of the departed, often highlighting accomplishments and quietly celebrating the departed's best traits, life accomplishments and other such things. It is a reflective time, having put away the previous night's wild partying. Finally, the third night is dedicated to the burial, be it symbolic (in the event of a lack of a body) or literal. Short speeches are typically said about the departed by those who knew him best and encouraging words for his afterlife and/or next life are said. Interestingly enough, the departed is buried with things important to him in life, which can be anything from a piece of jewelry to money to a book to a motorcycle. Whatever it is, the family best tries to accommodate the departed's wishes and where they are unclear the best guess is made.