1860 — Ada was born.
1861 — An early bloomer apparently, the infant Adelia sneezed bubbles. She soon after developed a full blown cold and required some pepper-up potion.
1863 — Ada proves herself a quiet child with a light step. She enjoys wandering about the house and hiding, giggling when people don't notice her which of course gives the game away.
1865 — Olive is born.
1866 — Ozias goes to Hogwarts leaving a very bereft sister behind. Ada fills the void with Olive who is a little more robust at nearly two.
1867 — Andren arrives. Ada is a little less intrigued by him than she was with Olive - the novelty is gone - but she hopes to enjoy his company when he's more mobile.
1869 — Ada has happily grown into the role of older sister and enjoys the responsibility of it. She is very protective of her younger siblings and enjoys making them smile.

1871 — It's finally her turn for Hogwarts. The sorting hat struggles to decide whether she ought to be in Hufflepuff or Ravenclaw, while it deliberates a little longer than usual, it makes up its mind to put her in Ravenclaw before she can become a hatstall.
1873 — Ada picks Divination, Arithmancy, and Care of Magical Creatures as her electives.
1876 — She is overlooked for prefect, but doesn't really mind. For her NEWTs, Ada continues with Arithmancy, Divination, Astronomy, and History of Magic.

1878 — Ada debuts and shortly after finds out her marriage to a Mr. Riley has been arranged.
1879 — Ada's happy little world suddenly crashes down around her. The death of not one, but two parents at the same time is deeply disturbing for her. She moves to Wellingtonshire to live with her older brother.
1881 — Much to Adelia's deep sorrow, she receives a letter from her betrothed breaking off the arrangement. Despite her distress, she doesn't fight his decision and accepts it as it must be what he wants.
1882 — Now having to function as an unattached debutante, Ada struggles to really enjoy it, possibly because she is still quietly pining for Mr. Riley. In reality, she languishes terribly at balls and simply goes through the motions. The news that her former fiancé is courting Miss Felicity Prewett reaches her and she feels quite certain that her betrothal was broken because of her. Though not a spiteful person by nature, she can't help but to bitterly resent the other girl for stealing what she felt was her future.
1883 — Olive is involved in a pornography scandal and disowned. Ada loathes the entire situation and feels very strongly that they have lost enough family to death without losing a sister over something so trivial. When Olive dies, Ada is heartbroken and refuses to speak to older brother for a couple weeks, blaming him for the fate of their poor sister. She breaks her silence after coming to the conclusion that she should treasure the family she has left.
1884 — Adelia tries a little harder to appear more interested in balls and social events. These efforts prove somewhat futile. She revisits her interest in fortune telling and rapidly becomes very superstitious - using star charts, horoscopes from various cultures, tea leaf reading, palmistry, anything she can to bolster her hope and chances of finding a partner. While they don't help her find a husband, they do give her hope and something pass the time with. Painting also becomes a great diversion. The family home burns down, by some miracle no one dies and the most Ada has to mourn are her painting and drawings.
1885 — After a rather traumatic accident involving a carriage she is left hospitalized. It is shortly after this that an Auror, Mr. Herondale, asks to court her. She is elated and accepts very readily. When the courtship abruptly ends a few months later, she is once again left feeling bitterly disappointed and bereft. She is at least spared the years of acquaintance that she shared with Mr. Riley. It is a small consolation, however.
1886 — Another year with no success! Spinsterhood looms. On August 14th, Spikelangelo, her hedgehog, sadly passed away after being sat on by Prunella Vaisey.

Spinsterhood has arrived *jazzhands*