Off-by-one error max_date_allowed in dcc.DatePickerRange

[MattiasOlla]

In recent versions (can't say from exactly when), there seems to be an off-by-one error in dcc.DatePickerRange. I set max_date_allowed = datetime.today().date(), but in the calendar, yesterday is the maximum date allowed. I see it in my apps, and it is also present in the first example on the DatePickerRange documentation page.

Example:

html.Div(
        dcc.DatePickerRange(
            id="date_range",
            start_date_placeholder_text="Start Period",
            end_date_placeholder_text="End Period",
            max_date_allowed=datetime.today().date(),
            display_format="YYYY-MM-DD",
            first_day_of_week=1,
            clearable=True,
            minimum_nights=0,
            persistence=True,
        ),
    )

I've also tried connecting callbacks to State("date_range", "max_date_allowed"), and there the received max date is today's date, so it only appears in the frontend.

Tested with server under both Windows 10 1909 and Linux Mint 19.1, and in both Google Chrome 85.0 and Firefox 80.0. Versions:

dash==1.16.0
dash-core-components==1.12.0
dash-html-components==1.1.1
dash-renderer==1.8.0
dash-table==4.10.1

[ankh6]

Hey @chriddyp I'd like to make my first contribution if the issue is free
I've searched for the module but have not found it. Could you redirect me to the relevant code section as I am not familiar (yet)
Are there other requirements in the scope of this issue ?

[sofiemor]

HI! Is this still available to work on?

[kevindehecker]

Isn't this fixed bij plotly/dash-core-components#930 ?

[Coding-with-Adam]

Yes, this has been fixed by #930.

Thank you @kevindehecker