import matplotlib.pyplot as plt
import matplotlib.dates as mdates
import datetime

dates = [datetime.datetime(2022, 2, 21, 0, 0),
         datetime.datetime(2022, 2, 22, 0, 0),
         datetime.datetime(2022, 2, 27, 0, 0)]
data1 = [5,8,12]

fig, ax = plt.subplots(1, 1, figsize=(20/2.54, 12/2.54))
plt.subplots_adjust(left=0.08, bottom=0.15, right=0.95)
plt.title("Date x-axis label angle bug")

b1 = ax.bar(dates, data1, width=0.7)

# Setup the date x-axis in weeks marking start of each week start
ax.xaxis.set_major_locator(mdates.WeekdayLocator(byweekday=mdates.MO))
ax.xaxis.set_major_formatter(mdates.DateFormatter('%a %b %d'))

# The same problem regardless the method to set the angle
#for label in ax.get_xticklabels(which='major'):
#    label.set(rotation=30, horizontalalignment='right')
plt.xticks(rotation=30, ha="right")

# Add a vline to force the auoscaling outside the data range
plt.axvline(x=datetime.datetime(2022, 3, 15, 0, 0))

plt.show()