Related Clues:
- Ripens, as cheese
- Numbers in photo album captions
- "Now he belongs to the ___"
- Jazz and Bronze
- Wises up, supposedly
- Grows older
- Decade units
- Has birthdays
- Century segments
- They're always advancing
- "... for children of all ___!"
- Senior, junior and sophomore
- "Middle" period
- Orbital periods
- 1492, 1776, 2001, etc.