N(R was used for young men up into their 20s. If you know Hebrew you can
find examples.
You have yet to show one ancient source that your speculated bronze age fall
and spring new years actually existed: all the sources you have pointed to
date from close to 2000 years later and later still.
Good scholarly practice demands that you be able to present primary sources,
and so far you have presented none.
And what about the ages listed in Genesis 11:10 ff? Three month “years”?