gStyle->SetTimeOffset(0);
TDatime dateBegin(2010,1,1,0,0,0);
TDatime dateEnd(2011,1,1,0,0,0);

auto h1 = new TH2I("h1","Machine A + B",12,dateBegin.Convert(),dateEnd.Convert(),1000,0,1000);
auto h2 = new TH2I("h2","Machine B",12,dateBegin.Convert(),dateEnd.Convert(),1000,0,1000);

h1->GetXaxis()->SetTimeDisplay(1);
h1->GetXaxis()->SetTimeFormat("%m/%y");
h1->GetXaxis()->SetTitle("Date [month/year]");

float Rand;
for (int i = dateBegin.Convert(); i < dateEnd.Convert(); i+=86400*30) {
   for (int j = 0; j < 1000; j++) {
      Rand = gRandom->Gaus(500+sin(i/10000000.)*100,50); h1->Fill(i,Rand);
      Rand = gRandom->Gaus(500+sin(i/11000000.)*100,70); h2->Fill(i,Rand);
   }
}

h1->SetBarWidth(0.4);
h1->SetBarOffset(-0.25);
h1->SetFillColor(kYellow);
h1->SetFillStyle(1001);

h2->SetBarWidth(0.4);
h2->SetBarOffset(0.25);
h2->SetLineColor(kRed);
h2->SetFillColor(kGreen);

auto c1 = new TCanvas();

h1->Draw("candle2");
h2->Draw("candle3 same");

gPad->BuildLegend(0.78,0.695,0.980,0.935,"","f");

gROOT->GetListOfCanvases()->Draw()