
1) Year indicator
Found on
https://www.crosswordclues.com/clue/treering

TreeRing is a Silicon Valley, CA-based technology company providing on-demand digital printing of customizable school yearbooks in the US and Canada. It is one of the first start-ups that changed the traditional yearbook industry: the company designed free software with social-networking features allowing the creation of personalized yearbooks and...
Found on
http://en.wikipedia.org/wiki/TreeRing
No exact match found.