diff --git a/PWGMM/Tasks/CMakeLists.txt b/PWGMM/Tasks/CMakeLists.txt
index b435559d94e..8cc92ca9204 100644
--- a/PWGMM/Tasks/CMakeLists.txt
+++ b/PWGMM/Tasks/CMakeLists.txt
@@ -22,4 +22,9 @@ o2physics_add_dpl_workflow(dndeta
 o2physics_add_dpl_workflow(ue-charged
                     SOURCES uecharged.cxx
                     PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore
-                    COMPONENT_NAME Analysis)	    
+                    COMPONENT_NAME Analysis)
+
+o2physics_add_dpl_workflow(lumi
+                    SOURCES lumi.cxx
+                    PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore
+                    COMPONENT_NAME Analysis)
diff --git a/PWGMM/Tasks/lumi.cxx b/PWGMM/Tasks/lumi.cxx
new file mode 100644
index 00000000000..5416a0c26d7
--- /dev/null
+++ b/PWGMM/Tasks/lumi.cxx
@@ -0,0 +1,47 @@
+// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
+// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
+// All rights not expressly granted are reserved.
+//
+// This software is distributed under the terms of the GNU General Public
+// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
+//
+// In applying this license CERN does not waive the privileges and immunities
+// granted to it by virtue of its status as an Intergovernmental Organization
+// or submit itself to any jurisdiction.
+/// \author Junlee Kim (jikim1290@gmail.com)
+/// \since November 2021
+
+#include "Framework/runDataProcessing.h"
+#include "Framework/AnalysisTask.h"
+#include "Framework/HistogramRegistry.h"
+
+using namespace o2;
+using namespace o2::framework;
+using namespace o2::framework::expressions;
+
+struct lumiTask {
+  HistogramRegistry histos{"histos", {
+                                       {"vertexx", "", {HistType::kTH1F, {{1000, -1, 1, "x"}}}},                                //
+                                       {"vertexy", "", {HistType::kTH1F, {{1000, -1, 1, "y"}}}},                                //
+                                       {"timestamp", "", {HistType::kTH1F, {{1000, 0, 5e7, "t"}}}},                             //
+                                       {"vertexx_timestamp", "", {HistType::kTH2F, {{1000, 0, 5e7, "t"}, {1000, -1, 1, "x"}}}}, //
+                                       {"vertexy_timestamp", "", {HistType::kTH2F, {{1000, 0, 5e7, "t"}, {1000, -1, 1, "y"}}}}  //
+                                     }};
+  uint64_t first_time = 1530314294062; // to be updated
+
+  void process(aod::Collision const& collision, aod::BCsWithTimestamps const&)
+  {
+    auto bc = collision.bc_as<aod::BCsWithTimestamps>();
+    histos.fill(HIST("vertexx"), collision.posX());
+    histos.fill(HIST("vertexy"), collision.posY());
+    histos.fill(HIST("timestamp"), bc.timestamp() - first_time);
+    //		LOGP(info, "Got timestamp {}", bc.timestamp());
+    histos.fill(HIST("vertexx_timestamp"), bc.timestamp() - first_time, collision.posX());
+    histos.fill(HIST("vertexy_timestamp"), bc.timestamp() - first_time, collision.posY());
+  } // need selections
+};
+
+WorkflowSpec defineDataProcessing(ConfigContext const& cfgc)
+{
+  return WorkflowSpec{adaptAnalysisTask<lumiTask>(cfgc)};
+}