An Anno is an equivalent of a year in Arvine. It lasts 175 18 hour days, and there about 100 of these in each age.
There are four passings in one Anno:
- Tilemn, lasting 43 days from 1-43
- Xevin, lasting 46 days from 44-89
- Hall, lasting 44 days from 90-133
- Clenig, lasting 42 days from 134-175