the.com/twenties
The decade you spend finding out which childhood dreams were actually other people's.
means The ten years from age 20 to 29, usually spent half-adulting and half-wondering when real life officially starts.
from Simple arithmetic dressed up as a life stage — '-ty' is the Old English suffix marking multiples of ten (as in 'twenty' itself, from twentig), and English just started using decade-names like 'twenties,' 'thirties,' etc. as shorthand for the years of a person's life or a century that share that leading digit. No deeper myth here — the word's drama was added by the humans living through it, not by its grammar.
- brain finishes
- prefrontal cortex matures around 25
- savings myth
- most net worth builds after 30, not before
- friendship churn
- you lose and replace most friends by 30
- career panic
- average person changes jobs every 2.8 years