DateListStepPlot
DateListStepPlot[{{date1,y1},{date2,y2},…}] plots the values yi in steps at a sequence of dates.
DateListStepPlot[{y1,y2,…},datespec] plots the values yi in steps with dates at equal intervals specified by datespec.
DateListStepPlot[tseries] plots the time series tseries.
DateListStepPlot[{data1,data2,…}] plots data from all the datai.
DateListStepPlot[…,step] plots using steps specified by step.
DateListStepPlot[{…,w[datai],…}] plots data datai with features defined by the symbolic wrapper w.
Please visit the official Wolfram Language Reference for more details and examples on core symbols.