Timeline (LOTSG)

The events of Legend of the Saiyan God span over 5 Million years and two separate timelines.

Age 763
Zero is born on Planet Frost with an unusually high power level.

Age 771
Kaestos' father is born in March, and his mother in June.

Age 774
Zero, at 11 years old, kills the previous rulers of the World Trade Organization and assumes leadership of the galactic power.

Age 785
The Z-Warrors are formed from the strongest fighters on the planet, with 3 Saiyans being among their numbers along with 2 Namekians and 4 incredibly strong humans.

Each of the Z-Warriors hold extremely high power levels and the humans are able to use a technique similar to Kaio-Ken to augement their power by 20 times, allowing them to fight still fight with the Super Saiyans and Super Namekians.

Age 800
Zero sends an elite battalion to secure Earth, however they are beaten back with only a few returning by the Z-Warriors of that era, which includes Kaestos' parents.

Age 803
Kaestos is born in his parent's home.

5 Million Before Age
Kaestos appears after having been sent through time at the planet of the Supreme Kais, encountering Kid Buu and the Western Supreme Kai during their fight. He helps drive off Kid Buu but sadly the Kai is killed.

Allie is "born" shortly afterwards.

Unknown Age
Long before the destruction of Planet Vegeta Kaestos and Allie appear on Planet Wagashi, intending to spend a sort of vacation there with Kaestos checking in under the name Monaka, they encounter Beerus during their vacation who intends to destroy the planet.

Allie attempts to stop Beerus however she is entirely outmatched an defeated by the God of Destruction, promting Kaestos to bare his fangs and fight Beerus with his full base power, giving him trouble and resulting in the planet being saved.

The legend of Monaka would later result in a  Wagashi-seijin  being named after the legend.

Age 763 Prime Zero is born, however his family is taken out by the descendants of Frost and he is sent to an Orphanage on another planet.

Kaestos is on the planet that Zero was sent to and after a brief moment takes the innocent Frost Demon as his own, raising Zero as his son.