Let's start. Years from before and during Mayura's death don't have dates

-------START---
-Ortensia banished from village; Nichole is born
-909 years later, Nichole is shattered into two beings (US Mayura and Prime Universe Mayura)
-Mayura and her brother are born 9 months later
-First war against Darkness has begun when Macy was 115
-Battle ends, Mayura becomes a dragon
----Now for the dates +years ---
-0028(10-12), Tyler and Andrew are born
-0047, Mayura is murdered; Her youngest(who resided in a dragon egg during that time) is captured and given away; Tyler and Andrew banished to Overworld
-1882(3-23), Chastity is Born
-1896(10-31), Anna and Amy are born
-1896(12-2), Sabrina is Born
-1896(12-3), Julian is born; Mavis dies
-1896(12-1), Original Sabrina dies; Cloning process happens; Haley and Harmony are "born"
-1888(5-13), Kira is "Born"
(Rest you already know from origin stories)

As a bonus since this is so short, this is about what happened in Harmony's flashback in the most recent part in her origins and more info on who and what Ro is.

Harmony had somehow gained a lost memory of someone from far in the past, it still haunts her to this day. She thinks that it was a vision if the future or it was something from a first life she might have had. She looked in libraries and online and found nothing about her dream, only the names, the people there, and what they were. They were a species of.. Humanoids, who had very advanced technology back in the day and colonized worlds. The colonies had to be on planets that could support life and one kind of season and it could not be changing. Ro, the youngest out of her 4 sisters, had no colonies or a planet. She was considered "unperfected". She was smaller compared to her sisters and was the same size as the servants, and she could easily fit into a drop-ship which held countless of their species. Ro wore limb-enhancers to help with her height and allow her to have a weapon on her at all times. But when she wasn't bugging Deviaa or the eldest sibling, Sevista, she would be either training or be with her second older sister, Manai. Each sister had specific role in their empire, and thus, having different sizes varying their signature gemstone type, color, and rarity.

-Sevista had a white diamond(so not based off Steven Universe, this is back from before I had social media and wrote stories on my old tablet about the 2nd Generation of Evil Youtubers. This was just something I did in my spare time) which was almost crystal clear, the rarest. The diamond was located on the middle of her chest, slightly below her collarbone. She was the one in charge
-Manai had a classic white quartz which was located in the palm of her left hand. Her and Deviaa were second in command and controlled the army and fleet across the colonized worlds and their homeworld
-Deviaa had a VERY light pink quartz(her and Manai are the same age and were created at the same time through a sort of mutation almost, but they can disappear at will and it would just be their gems, they have a physical form. I swear this wasn't based off Steven Universe, I never watched the show back then and I knew NOTHING) which was located on the right palm of her hand
-Ro had two amethyst pupils that were out of the ordinary(WAIT), but it is possible that she was a gen. 2 of that species. She had no role among the species, but Manai also said that Ro should have a colony of her own, but was denied by Sevista until years later where she was finally given one, but the weather was always changing and it was capable of supporting life, but the place where the set up the species "mutation" (IDK what to call it, it involves core energy turning into a hardened gem or mineral then combined with a small amount of radiation and remaining life energy from dead civilians on failed colonies(they were given a proper burial don't worry) ).

The gem acts as their main life source, if shattered or drained of life energy, the person will die and it will be devastating.

I actually remembered all that holy crap XD