old_contents: from pandas import (
      Timestamp
  )
  
  # Apr. 30 (Tue.)    Abdication Day
  # May 1 (Wed.)    Accession Day
  # May 2 (Thu.)    National Holiday
  # May 3 (Fri.)    Constitution Memorial Day
  # May 4 (Sat.)    Greenery Day
  # May 6 (Mon.)    Children's Day (May 5) observed
  AscensionDays = [
      Timestamp('2019-04-30', tz='Asia/Tokyo'),
      Timestamp('2019-05-01', tz='Asia/Tokyo'),
      Timestamp('2019-05-02', tz='Asia/Tokyo'),
      Timestamp('2019-05-03', tz='Asia/Tokyo'),
      Timestamp('2019-05-06', tz='Asia/Tokyo'),
  ]
  
new_contents: # JP Holidays
  
  from pandas import date_range
  
  AscensionOfNewEmperor2019 = date_range('2019-04-30', '2019-05-02', tz='UTC')
  
subject: Update holidays_jp.py