I would love to have at least 2 tiers of filters for tables and calendars when using custom filters. It would operate like parent and child filters.
First row of filters displays only records in choices 2013 or 2014 or 2015
Second row Display records only in month: Jan-Dec
This way you would not need to set up 36 custom filters to view the 36 options listed above. You could do it with 15.