How to form an array of quarter start dates?

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MaxxZ2018-08-26 21:58:48

Python

MaxxZ, 2018-08-26 21:58:48

How to form an array of quarter start dates?

How to form an array of quarter start dates? Or how to place on the x-axis in matplotlib major marks corresponding to the beginning of the quarter?
Manually it would be:
xdate = [date(2012, 1, 1), date(2012, 4, 1), date(2012, 7, 1), date(2012, 10, 1), date(2013, 1, 1)]
xdate_f = mdates.date2num(xdate)
x_locator = ticker.FixedLocator (xdate_f)
ax.xaxis.set_major_locator(x_locator)
Maybe without a bike, ready-made functions?

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