Example lead time by time of year

The following table shows the default configuration of lead time by time of year (date ranges are inclusive):

Date Range	Lead Time
January 1 through January 15	15
January 16 through July 31	0
August 1 through September 15	-10
September 16 through end of year	0

You can configure this in the Renewal plugin. For more information, see Renewal plugin.