diff --git a/CHANGELOG.md b/CHANGELOG.md
index c602b14..035b942 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [0.1.13] - Unreleased
 
+### Changed
+
+- Dormant capability is now declared on each cycle class (`def self.dormant_capable? = true`) instead of only in `Parser.dormant_capable_kinds`
+
 ## [0.1.12] - 2025-09-05
 
 ### Added
diff --git a/lib/sof/cycle.rb b/lib/sof/cycle.rb
index 9adf732..0010e51 100644
--- a/lib/sof/cycle.rb
+++ b/lib/sof/cycle.rb
@@ -130,6 +130,8 @@ def legend
       attr_reader :notation_id, :kind, :valid_periods
       def volume_only? = @volume_only
 
+      def dormant_capable? = false
+
       def recurring? = raise "#{name} must implement #{__method__}"
 
       # Raises an error if the given period isn't in the list of valid periods.
diff --git a/lib/sof/cycles/end_of.rb b/lib/sof/cycles/end_of.rb
index b86c572..310f257 100644
--- a/lib/sof/cycles/end_of.rb
+++ b/lib/sof/cycles/end_of.rb
@@ -18,6 +18,8 @@ class EndOf < Cycle
 
       def self.recurring? = true
 
+      def self.dormant_capable? = true
+
       def self.description
         "End of - occurrences by the end of a time period"
       end
diff --git a/lib/sof/cycles/within.rb b/lib/sof/cycles/within.rb
index d3120cd..05ab165 100644
--- a/lib/sof/cycles/within.rb
+++ b/lib/sof/cycles/within.rb
@@ -10,6 +10,8 @@ class Within < Cycle
 
       def self.recurring? = false
 
+      def self.dormant_capable? = true
+
       def self.description
         "Within - occurrences within a time period from a specific date"
       end
diff --git a/lib/sof/parser.rb b/lib/sof/parser.rb
index 967fd45..cdc9b3b 100644
--- a/lib/sof/parser.rb
+++ b/lib/sof/parser.rb
@@ -20,7 +20,9 @@ class Parser
       (?<from>F(?<from_date>\d{4}-\d{2}-\d{2}))?$ # optional from
     /ix
 
-    def self.dormant_capable_kinds = %w[E W]
+    def self.dormant_capable_kinds
+      Cycle.cycle_handlers.select(&:dormant_capable?).map(&:notation_id).compact
+    end
 
     def self.for(notation_or_parser)
       return notation_or_parser if notation_or_parser.is_a? self