Related Clues:
- Anniversaries mark them
- People celebrate when they change
- Achieves senior status?
- A long time back for example visiting S Africa
- Turns 100
- Neptune's are about 165 times longer than ours
- Develops wrinkles, say
- Presidential term's four
- There are 10 in a decade
- Like, for-EV-er
- Quite a while, old-style
- Quite a long, long time
- Stone and Bronze, for two
- Goes from 1 to 2, say
- Goes from 12 to 13, say