Something like your script below @justinedwards.jle, from this post could likely be tweaked to get specific results:
# Written for the configureChart extension function
#def configureChart(self, chart):
from java.text import SimpleDateFormat
from org.jfree.chart.axis import DateAxis
pureDateFormat = SimpleDateFormat("")
pureTimeFormat = SimpleDateFormat("")
dateAxis = DateAxis()
plot = chart.getPlot()
plot.setDomainAxis(dateAxis)
plotField1 = plot.getClass().getDeclaredField('dateFormat')
plotField2 = plot.getClass().getDeclaredField('timeFormat')
plotField1.setAccessible(True)
plotField2.setAccessible(True)
plotField1.set(plot, pureDateFormat)
plotField2.set(plot, pureTimeFormat)