如何在dataframe python中找到非时间戳数据？

import pandas as pd

df = pd.DataFrame({'A': [1, 2, 3], 'B': ['a', 'b', 'c'], 'C': pd.to_datetime(['2022-01-01', '2022-01-02', '2022-01-03'])})

non_timestamp_data = df.select_dtypes(exclude=['datetime'])