diff --git a/opm/common/utility/TimeService.hpp b/opm/common/utility/TimeService.hpp
index 94a3aa36c..f50fdfe32 100644
--- a/opm/common/utility/TimeService.hpp
+++ b/opm/common/utility/TimeService.hpp
@@ -20,6 +20,7 @@
 #ifndef OPM_TIMESERVICE_HEADER_INCLUDED
 #define OPM_TIMESERVICE_HEADER_INCLUDED
 
+#include <chrono>
 #include <ctime>
 
 namespace Opm {
@@ -61,6 +62,7 @@ namespace Opm {
         int usec_{0};
     };
 
+    TimeStampUTC operator+(const TimeStampUTC& lhs, std::chrono::duration<double> delta);
     std::time_t asTimeT(const TimeStampUTC& tp);
 
 } // namespace Opm
diff --git a/src/opm/common/utility/TimeService.cpp b/src/opm/common/utility/TimeService.cpp
index 9df7ed464..8272c50d3 100644
--- a/src/opm/common/utility/TimeService.cpp
+++ b/src/opm/common/utility/TimeService.cpp
@@ -75,6 +75,7 @@ Opm::TimeStampUTC& Opm::TimeStampUTC::operator=(const std::time_t tp)
     return *this;
 }
 
+
 Opm::TimeStampUTC::TimeStampUTC(const YMD& ymd)
     : ymd_{ std::move(ymd) }
 {}
@@ -117,3 +118,9 @@ std::time_t Opm::asTimeT(const TimeStampUTC& tp)
 
     return makeUTCTime(timePoint);
 }
+
+Opm::TimeStampUTC Opm::operator+(const Opm::TimeStampUTC& lhs, std::chrono::duration<double> delta) {
+    return Opm::TimeStampUTC( advance(Opm::asTimeT(lhs) , delta.count()) );
+}
+
+
diff --git a/tests/parser/TimeMapTest.cpp b/tests/parser/TimeMapTest.cpp
index 466f99eb3..ab3d3aacb 100644
--- a/tests/parser/TimeMapTest.cpp
+++ b/tests/parser/TimeMapTest.cpp
@@ -619,3 +619,16 @@ Opm::DeckRecord createDeckRecord(int day, const std::string &month, int year, co
 
     return deckRecord;
 }
+
+
+BOOST_AUTO_TEST_CASE(TimeServiceOperatorPlus) {
+    Opm::TimeStampUTC t0(Opm::TimeMap::mkdatetime(2010,1,1,0,0,0));
+    auto t1 = t0 + std::chrono::duration<double>(3600*24 + 0.50);
+
+    BOOST_CHECK_EQUAL(t1.year(), 2010);
+    BOOST_CHECK_EQUAL(t1.month(), 1);
+    BOOST_CHECK_EQUAL(t1.day(), 2);
+    BOOST_CHECK_EQUAL(t1.microseconds(), 500000);
+}
+
+