+ current_month_long => [ $period_start_date->clone->truncate(to => 'month'), sub { $month_names[ $_[0]->month ] } ],
+ previous_month_long => [ $period_start_date->clone->truncate(to => 'month')->subtract(months => 1), sub { $month_names[ $_[0]->month ] } ],
+ next_month_long => [ $period_start_date->clone->truncate(to => 'month')->add( months => 1), sub { $month_names[ $_[0]->month ] } ],
+