import pandas as pd
import numpy as np

from bokeh.models import ColumnDataSource, HoverTool
from bokeh.plotting import figure, show
from bokeh.models.dom import Div, Styles, Template, ValueRef


source = ColumnDataSource(
    data=dict(x=[0], y=[0], date=np.array([np.datetime64("2020-01-01")]))
)


def template_tooltips():
    style = Styles(
        display="grid",
        grid_template_columns="auto auto",
        column_gap="10px",
    )
    grid = Div(style=style)
    grid.children = [
        "date",
        ValueRef(field="date{%F}"),
    ]
    return Template(children=[grid])


hovertool1 = HoverTool(
    tooltips=[("date", "@date{%F}")],
    formatters={"@date": "datetime"},
)


hovertool2 = HoverTool(
    tooltips=template_tooltips(),
    formatters={"@date": "datetime"},
)

p = figure(width=400, height=400)
p.add_tools(hovertool1)
p.add_tools(hovertool2)
p.circle("x", "y", size=20, source=source)

show(p)