datetime_axis

import pandas as pd

from bokeh.plotting import figure, show
from bokeh.sampledata.stocks import AAPL

df = pd.DataFrame(AAPL)
df['date'] = pd.to_datetime(df['date'])

# create a new plot with a datetime axis type
p = figure(width=800, height=250, x_axis_type="datetime")

p.line(df['date'], df['close'], color='navy', alpha=0.5)

show(p)