code: def pdf1(self):
      date1 = pd.Series(
          pd.date_range("2012-1-1 12:45:31", periods=3, freq="M")
      )
      date2 = pd.Series(
          pd.date_range("2013-3-11 21:45:00", periods=3, freq="W")
      )
      return pd.DataFrame(dict(start_date=date1, end_date=date2))
  
imports: import datetime
  import unittest
  import numpy
  import pandas
  from pyspark import pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase
  from pyspark.testing.sqlutils import SQLTestUtils
label_desc: Use image node_id 1 for calling the SeriesDateTimeTestsMixin obj's underlying member method code with example usage: obj.pdf1() and returns: pd