So the end of Survive is set around 9771, and the epilogue "a few years after the main events." In the epilogue, Margot Kassiopei, their oldest child, is said to be five years old, which means it must be about 5 or 5 1/2 years after the main events of Survive, which puts my guess for what year it is at about 9776 or 9777, and possibly 9778 but I feel that is less likely. Then the twins (Romhutat Kassiopei II and Suval Kassiopei) who are three and a half - going with my previous guess, they were probably born in 9773 or 9774, and Oalla Kassiopei is said to be two, so about 9774 or 9775, and Erita Kassiopei, being a newborn, was probably born the same year the epilogue is set in, or perhaps the previous year if the epilogue is set in early 9776 or 9777. Thanks for listening to my rambling...
To summarize, my guess is that the epilogue was set in 9776-9777, Margot was born in 9771-9772, Romhutat and Suval in 9773 or 9774, Oalla in 9774 or 9775, and Erita was born either 9776 or 9777.
- Sunny