Only update container to latest version of image if some number of days have passed since it has been published. This option may be useful for those who wish to avoid updating prior to the new version having some time in the field prior to updating in case there are critical defects found and released in a subsequent version.
```text
Argument: --defer-days
Environment Variable: WATCHTOWER_DEFER_DAYS
Type: Integer
Default: false
```
## Scheduling
[Cron expression](https://pkg.go.dev/github.com/robfig/cron@v1.2.0?tab=doc#hdr-CRON_Expression_Format) in 6 fields (rather than the traditional 5) which defines when and how often to check for new images. Either `--interval` or the schedule expression
can be defined, but not both. An example: `--schedule "0 0 4 * * *"`
log.Infof("New image found for %s that was created %d day(s) ago but update deferred until %d day(s) after creation",targetContainer.Name(),imageAgeDays,params.DeferDays)
// technically the container is stale but we set it to false here because it is this stale flag that tells downstream methods whether to perform the update