diff --git a/lib/icinga/downtime.cpp b/lib/icinga/downtime.cpp
index 914531339..8e5ccabba 100644
--- a/lib/icinga/downtime.cpp
+++ b/lib/icinga/downtime.cpp
@@ -246,6 +246,12 @@ Downtime::Ptr Downtime::AddDowntime(const Checkable::Ptr& checkable, const Strin
 		if (localZone) {
 			attrs->Set("authoritative_zone", localZone->GetName());
 		}
+
+		auto sd (ScheduledDowntime::GetByName(scheduledDowntime));
+
+		if (sd) {
+			attrs->Set("config_owner_hash", sd->HashDowntimeOptions());
+		}
 	}
 
 	Host::Ptr host;
diff --git a/lib/icinga/downtime.ti b/lib/icinga/downtime.ti
index ea3c1a5ee..a015942d3 100644
--- a/lib/icinga/downtime.ti
+++ b/lib/icinga/downtime.ti
@@ -69,6 +69,7 @@ class Downtime : ConfigObject < DowntimeNameComposer
 	[state] int legacy_id;
 	[state] bool was_cancelled;
 	[config] String config_owner;
+	[config] String config_owner_hash;
 	[config] String authoritative_zone;
 
 	[no_user_view, no_user_modify] String removed_by;
diff --git a/lib/icinga/scheduleddowntime.cpp b/lib/icinga/scheduleddowntime.cpp
index ae38ca9b6..282700a83 100644
--- a/lib/icinga/scheduleddowntime.cpp
+++ b/lib/icinga/scheduleddowntime.cpp
@@ -6,13 +6,17 @@
 #include "icinga/downtime.hpp"
 #include "icinga/service.hpp"
 #include "base/timer.hpp"
+#include "base/tlsutility.hpp"
 #include "base/configtype.hpp"
 #include "base/utility.hpp"
 #include "base/objectlock.hpp"
+#include "base/object-packer.hpp"
+#include "base/serializer.hpp"
 #include "base/convert.hpp"
 #include "base/logger.hpp"
 #include "base/exception.hpp"
 #include <boost/thread/once.hpp>
+#include <set>
 
 using namespace icinga;
 
@@ -333,6 +337,22 @@ void ScheduledDowntime::ValidateChildOptions(const Lazy<Value>& lvalue, const Va
 	}
 }
 
+static const std::set<String> l_SDDowntimeOptions ({
+	"author", "child_options", "comment", "duration", "fixed", "ranges", "vars"
+});
+
+String ScheduledDowntime::HashDowntimeOptions()
+{
+	Dictionary::Ptr allOpts = Serialize(this, FAConfig);
+	Dictionary::Ptr opts = new Dictionary();
+
+	for (auto& opt : l_SDDowntimeOptions) {
+		opts->Set(opt, allOpts->Get(opt));
+	}
+
+	return SHA256(PackObject(opts));
+}
+
 bool ScheduledDowntime::AllConfigIsLoaded()
 {
 	return m_AllConfigLoaded.load();
diff --git a/lib/icinga/scheduleddowntime.hpp b/lib/icinga/scheduleddowntime.hpp
index 90e12d240..3c1a23d47 100644
--- a/lib/icinga/scheduleddowntime.hpp
+++ b/lib/icinga/scheduleddowntime.hpp
@@ -35,6 +35,7 @@ public:
 
 	void ValidateRanges(const Lazy<Dictionary::Ptr>& lvalue, const ValidationUtils& utils) override;
 	void ValidateChildOptions(const Lazy<Value>& lvalue, const ValidationUtils& utils) override;
+	String HashDowntimeOptions();
 
 protected:
 	void OnAllConfigLoaded() override;