old_contents: #!/usr/bin/python
  # @author Vsevolod Ivanov
  
  import pytz
  import datetime
  import argparse
  
  __version__ = '0.1'
  __author__ = u'Vsevolod Ivanov'
  __appname__ = u'Datetime PyAPI'
  __description__ = u'i.e.: python datetimes.py --start $(date +%Y-%m-%d-%H:%M:%S) --end-delta 24'
  
  DT_FMT = '%Y-%m-%d-%H:%M:%S'
  
  def get_parser():
      parser = argparse.ArgumentParser(__appname__, description=__description__)
      parser.add_argument('--version', '-v', action='version', version='%(prog)s '+__version__)
      parser.add_argument('--timezone', required=False, type=str, default='America/Montreal',
                          help='Timezone string i.e. UTC, American/Montreal')
      parser.add_argument('--start-time', '-s', required=True,
                          type=lambda s: datetime.datetime.strptime(s, DT_FMT),
                          help="Start time i.e. '2021-04-05-14:00:00'")
      parser.add_argument('--end-delta', '-e', required=True, type=int,
                          help="Delta delay in hours added to start time: i.e. -24, 24")
      return parser
  
  if __name__ == '__main__':
      parser = get_parser()
      args = parser.parse_args()
      start = args.start_time
      now = datetime.datetime.now(pytz.timezone(args.timezone))
      end = now + datetime.timedelta(hours=args.end_delta)
      print('\n'.join(['Now:      {}', 'Start:    {}', 'End:      {}']).format(
            now.strftime(DT_FMT), start.strftime(DT_FMT), end.strftime(DT_FMT)))
  
new_contents: #!/usr/bin/python
  # @author Vsevolod Ivanov
  
  import pytz
  import datetime
  import argparse
  
  __version__ = '0.1'
  __author__ = u'Vsevolod Ivanov'
  __appname__ = u'Datetime PyAPI'
  __description__ = u'i.e.: python datetimes.py --start $(date +%Y-%m-%d-%H:%M:%S) --end-delta 24'
  
  DT_FMT = '%Y-%m-%d-%H:%M:%S'
  
  def get_parser():
      parser = argparse.ArgumentParser(__appname__, description=__description__)
      parser.add_argument('--version', '-v', action='version', version='%(prog)s '+__version__)
      parser.add_argument('--timezone', required=False, type=str, default='America/Montreal',
                          help='Timezone string i.e. UTC, America/Montreal')
      parser.add_argument('--start-time', '-s', required=True,
                          type=lambda s: datetime.datetime.strptime(s, DT_FMT),
                          help="Start time i.e. '2021-04-05-14:00:00'")
      parser.add_argument('--end-delta', '-e', required=True, type=int,
                          help="Delta delay in hours added to start time: i.e. -24, 24")
      return parser
  
  if __name__ == '__main__':
      parser = get_parser()
      args = parser.parse_args()
      start = args.start_time
      now = datetime.datetime.now(pytz.timezone(args.timezone))
      end = now + datetime.timedelta(hours=args.end_delta)
      print('\n'.join(['Now:      {}', 'Start:    {}', 'End:      {}']).format(
            now.strftime(DT_FMT), start.strftime(DT_FMT), end.strftime(DT_FMT)))
  
subject: fix datetimes help typo