Histogram or kde from datetime column
It always annoyed me that it was not possible to generate a histogram or kernel density estimation plot from a datetime column.

Is there interest in a solution following this approach?
[Link to SO](https://stackoverflow.com/a/60617297)

```python
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

df = pd.DataFrame({"datetime": pd.to_datetime(np.random.randint(1582800000000000000, 1583500000000000000, 100, dtype=np.int64))})
fig, ax = plt.subplots()
df["datetime"].astype(np.int64).plot.hist(ax=ax)
labels = ax.get_xticks().tolist()
labels = pd.to_datetime(labels)
ax.set_xticklabels(labels, rotation=90)
plt.show()
```

![2UUMI](https://user-images.githubusercontent.com/31596773/76345209-3563b500-6303-11ea-8f81-d6a2198e8c4f.jpg)



I didn't look into the the pandas source code yet, but if there is interest in something like this I will look into it.

I think the main issue will be finding good x tick labels, if thats a requirement.

Greetings!
