2 files changed, 14 insertions, 0 deletions
diff --git a/src/linkgraph/linkgraphschedule.cpp b/src/linkgraph/linkgraphschedule.cpp
index 7e2c66f8f..366a3c517 100644
--- a/src/linkgraph/linkgraphschedule.cpp
+++ b/src/linkgraph/linkgraphschedule.cpp
@@ -126,6 +126,19 @@ void LinkGraphSchedule::SpawnAll()
 }
 
 /**
+ * Shift all dates (join dates and edge annotations) of link graphs and link
+ * graph jobs by the number of days given.
+ * @param interval Number of days to be added or subtracted.
+ */
+void LinkGraphSchedule::ShiftDates(int interval)
+{
+	LinkGraph *lg;
+	FOR_ALL_LINK_GRAPHS(lg) lg->ShiftDates(interval);
+	LinkGraphJob *lgj;
+	FOR_ALL_LINK_GRAPH_JOBS(lgj) lgj->ShiftJoinDate(interval);
+}
+
+/**
  * Create a link graph schedule and initialize its handlers.
  */
 LinkGraphSchedule::LinkGraphSchedule()
diff --git a/src/linkgraph/linkgraphschedule.h b/src/linkgraph/linkgraphschedule.h
index 911fa389a..25c56904f 100644
--- a/src/linkgraph/linkgraphschedule.h
+++ b/src/linkgraph/linkgraphschedule.h
@@ -62,6 +62,7 @@ public:
 	void SpawnNext();
 	void JoinNext();
 	void SpawnAll();
+	void ShiftDates(int interval);
 
 	/**
 	 * Queue a link graph for execution.