2 files changed, 4 insertions, 4 deletions
diff --git a/src/openvic-simulation/misc/Define.cpp b/src/openvic-simulation/misc/Define.cpp
index 5e6a3cb..c866b5d 100644
--- a/src/openvic-simulation/misc/Define.cpp
+++ b/src/openvic-simulation/misc/Define.cpp
@@ -36,11 +36,11 @@ bool DefineManager::add_define(std::string_view name, std::string&& value, Defin
 	return defines.add_item({ name, std::move(value), type }, duplicate_warning_callback);
 }
 
-const Date& DefineManager::get_start_date() const {
+Date DefineManager::get_start_date() const {
 	return *start_date;
 }
 
-const Date& DefineManager::get_end_date() const {
+Date DefineManager::get_end_date() const {
 	return *end_date;
 }
 
diff --git a/src/openvic-simulation/misc/Define.hpp b/src/openvic-simulation/misc/Define.hpp
index 0db9716..56ce0b0 100644
--- a/src/openvic-simulation/misc/Define.hpp
+++ b/src/openvic-simulation/misc/Define.hpp
@@ -42,8 +42,8 @@ namespace OpenVic {
 		bool add_date_define(std::string_view name, Date date);
 		IDENTIFIER_REGISTRY_ACCESSORS(define);
 
-		const Date& get_start_date() const;
-		const Date& get_end_date() const;
+		Date get_start_date() const;
+		Date get_end_date() const;
 
 		bool load_defines_file(ast::NodeCPtr root);
 	};