[Bug]: ConciseDateFormatter not showing offset #21670
Description
Bug summary
When I create time series plot with too big time range, I can't see offset in lower right corner.
Code for reproduction
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
LEN = 40000
dt_index = pd.date_range('2013-01-01 00:00', periods=LEN, freq='5min')
df = pd.DataFrame({'data': np.random.randint(10, size=LEN)},index=dt_index)
fig, ax = plt.subplots()
import matplotlib.dates as mdates
locator = mdates.AutoDateLocator()
formatter = mdates.ConciseDateFormatter(locator)
ax.xaxis.set_major_locator(locator)
ax.xaxis.set_major_formatter(formatter)
ax.plot(df.index, df.data)
plt.show()Actual outcome
Expected outcome
Additional information
When changing time range with fewer points, I can see the offset as seen in expected outcome.
Operating system
Ubuntu
Matplotlib Version
3.4.3
Matplotlib Backend
Qt5Agg
Python version
3.9
Jupyter version
No response
Installation
No response