def METHOD_NAME():
    assert check_start_less_than_end("2022-01-01", "2022-01-02") is False
    assert check_start_less_than_end("2022-01-02", "2022-01-01") is True
    assert check_start_less_than_end("2022-01-01", "2022-01-01") is True
    assert check_start_less_than_end(None, "2022-01-01") is False
    assert check_start_less_than_end("2022-01-02", None) is False
    assert check_start_less_than_end(None, None) is False