Is there an option to control the maximum number days to roll?
At first I thought this was controlled by the "backups" option, but a quick look at RollingFileStream.js seems to indicate that this manages indexes, not necessarily related to the date rolling pattern.
As of this post, there is no mechanism to control the maximum number of days to roll with the "dateFile" appender: https://github.com/nomiddlename/log4js-node/issues/323
The manager of the github project has agreed that this would be a useful feature - so maybe a resolution could made available in the future.