BUG: non-monotonic DatetimeIndex does not raise KeyError for missing labels #7827
Description
import pandas as pd
index = pd.to_datetime(['2000-01-02', '2000-01-01'])
index.get_loc('1900-01-01')array([], dtype=int64)
{{ message }}
import pandas as pd
index = pd.to_datetime(['2000-01-02', '2000-01-01'])
index.get_loc('1900-01-01')array([], dtype=int64)