code: func (c Calendar) formatDateTimeComponentPeriodAbbreviated(hour int) string {
  	if hour < 12 {
  		return c.FormatNames.Periods.Abbreviated.AM
  	}
  
  	return c.FormatNames.Periods.Abbreviated.PM
  }
docs: // formatDateTimeComponentPeriodAbbreviated renders an abbreviated period
  // component.