Sorting data by day entries in a specific month

  matplotlib, python

I have a dataset that spans 50 years. Most of the entries across the timespan are in the month of July. How do I display all of these ‘July’ entries into days of the month on a graph?. I would like to see if there is a most common day in ‘July’ for reports. I have no problem creating a graph of months but can’t seem to isolate a particular month and plot the days.

Source: Python Questions