ibis plot fails with dtype date32

[MarcoGorelli]

What happened?

import polars as pl
import altair as alt
from datetime import date

import ibis
df = pl.DataFrame(
    {
        "a": [1,2,3],
        "b": [date(2020, 1, 1), date(2020, 1, 2), date(2020, 1, 3)],
    }
)
tbl = ibis.memtable(df)
print(tbl.to_pyarrow())
alt.Chart(tbl).mark_line().encode(x="a", y="b").to_json()

raises:

ValueError: Data type date32[day] not supported by interchange protocol

What would you like to happen instead?

Plot it without raising

Which version of Altair are you using?

5.3.0

[jonmmease]

Here is the upstream issue: apache/arrow#39539