How old is the MC in your mod?
Viewing post in Far Beyond The World: Reverse World comments
Here, in fact, everything is very difficult, since much depends on the expiration of time in the universe and, in principle, the concepts of multiverses.
I roughly assume that the expiration time of FBTW and HLH, plus or minus, differs by either 1 year or 5 years.
in FBTW time frame he is approximately 25-30 years old.
in HLH's time frame he is approximately 20-25 years old.