Center date period as tick label between tick marks for time series plots

[Skiks]

Hi @shoops,
I may have found what you need here.
The year is not centered, it is displayed below the first label, but that is a good formatting too.

You can add ticks also:

fig.update_xaxes(
    dtick="M1",
    tickformat="%b\n%Y",
    ticklabelmode="period",

    ticks="inside",
    minor=dict(
        ticks="outside",
        tickwidth=2,
        ticklen=30,
        dtick="M12",

    ),
)

And easily change the periods:

fig.update_xaxes(

    dtick="M3",
    tickformat="Q%q\n%Y",

    ticklabelmode="period",
    ticks="inside",
    minor=dict(
        ticks="outside",
        tickwidth=2,
        ticklen=30,
        dtick="M12",
    ),
)