code: def to_server_timezone(self, timezones, for_year):
          
          candidates = set()
          for tz_id, tz_name, tz_periods, tz_transitions, tz_transitions_groups in timezones:
              candidate = self.from_server_timezone(tz_periods, tz_transitions, tz_transitions_groups, for_year)
              if candidate == self:
                  log.debug('Found exact candidate: %s (%s)', tz_id, tz_name)
                  # We prefer this timezone over anything else. Return immediately.
                  return tz_id
              # Reduce list based on base bias and standard / daylight bias values
              if candidate.bias != self.bias:
                  continue
              if candidate.standard_time is None:
                  if self.standard_time is not None:
                      continue
              else:
                  if self.standard_time is None:
                      continue
                  if candidate.standard_time.bias != self.standard_time.bias:
                      continue
              if candidate.daylight_time is None:
                  if self.daylight_time is not None:
                      continue
              else:
                  if self.daylight_time is None:
                      continue
                  if candidate.daylight_time.bias != self.daylight_time.bias:
                      continue
              log.debug('Found candidate with matching biases: %s (%s)', tz_id, tz_name)
              candidates.add(tz_id)
          if not candidates:
              raise ValueError('No server timezones match this timezone definition')
          if len(candidates) == 1:
              log.info('Could not find an exact timezone match for %s. Selecting the best candidate', self)
          else:
              log.warning('Could not find an exact timezone match for %s. Selecting a random candidate', self)
          return candidates.pop()
docs: Returns the Microsoft timezone ID corresponding to this timezone. There may not be a match at all, and there
          may be multiple matches. If so, we return a random timezone ID.
  
          :param timezones: A list of server timezones, as returned by
              list(account.protocol.get_timezones(return_full_timezone_data=True))
          :param for_year:
          :return: A Microsoft timezone ID, as a string