[Python] Uneven intervals between x-axis with datetime

I am currently experiencing an issue where the spaces between ticks on my plot appear to have uneven intervals when using a DatetimeIndex for my x-axis. The code is as follows:

x = pd.date_range('2018-11-03', '2018-12-30')
plt.plot(x, np.arange(len(x)))
plt.xticks(rotation=45)




Note the two instances in which the dates do not increment by the typical 7-day period. Even after extending the time period, the issue persists:

x = pd.date_range('2018-11-03', '2019-03-20')
plt.plot(x, np.arange(len(x)))
plt.xticks(rotation=45)




How can I override this behavior to have standard 7-day intervals on my plot? Thank you.

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