This was originally opened as a github issue, way before this forum existed. Closing the github issue so this can be tracked with other feature requests. Original github issue: https://github.com/home-assistant/home-assistant/issues/1267
Basically I have a sensor that is only checked once a day, I would like to see the status of that sensor over time ideally for a 12 month period. Since this is probably not a very common thing it would be nice to have it configurable for the number of days to display. Maybe an option under customization? history_days: 365?