diff --git a/src/helper.cpp b/src/helper.cpp
index a059700b..51ab3d1c 100644
--- a/src/helper.cpp
+++ b/src/helper.cpp
@@ -401,3 +401,24 @@ std::string jsonFromIntervals (const std::vector <Interval>& intervals)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+std::vector <Interval> intervalsFromHolidays (const Rules& rules)
+{
+  std::vector <Interval> results;
+  for (auto& holiday : rules.all ("holidays."))
+  {
+    auto lastDot = holiday.rfind ('.');
+    if (lastDot != std::string::npos)
+    {
+      Interval h;
+      Datetime d (holiday.substr (lastDot + 1), "Y_M_D");
+      h.start (d);
+      ++d;
+      h.end (d);
+      results.push_back (h);
+    }
+  }
+
+  return results;
+}
+
+////////////////////////////////////////////////////////////////////////////////
diff --git a/src/timew.h b/src/timew.h
index b74f2198..8f0d6c1f 100644
--- a/src/timew.h
+++ b/src/timew.h
@@ -54,6 +54,7 @@ Timeline createTimelineFromData (const Rules&, Database&, const Filter&);
 Interval getLatestInterval (Database&);
 bool intervalMatchesFilter (const Interval&, const Filter&);
 std::string jsonFromIntervals (const std::vector <Interval>&);
+std::vector <Interval> intervalsFromHolidays (const Rules&);
 
 // utiŀ.cpp
 std::string osName ();