code: def sunday_to_monday(dt):
      """
      If holiday falls on Sunday, use day thereafter (Monday) instead.
      """
      if dt.weekday() == 6:
          return dt + timedelta(1)
      return dt
  
imports: from datetime import datetime, timedelta
  import warnings
  from dateutil.relativedelta import FR, MO, SA, SU, TH, TU, WE
  import numpy
  from pandas.compat import add_metaclass
  from pandas.errors import PerformanceWarning
  from pandas import DateOffset, Series, Timestamp, date_range
  from pandas.tseries.offsets import Day, Easter
label_desc: Use image node_id 4 for calling a global function with example usage: sunday_to_monday(dt) and returns: dt, unknown