| Answer | Crossword Clue |
|---|---|
| SOLAR | System or year |
| ERA | Year-numbering system |
| BCS | NCAA year-end games system |
| GOLDSTANDARD | Monetary backup system for the 50th year |
| ONEBC | Year before the A.D. system began |
| calendar | A system by which the beginning, length, and subdivisions of the year are fixed |
| calendars | A system by which the beginning, length, and subdivisions of the year are fixed |
