| Overload | Description |
|---|---|
| Add(TimeSpan) | The specified TimeSpan will be added to this instance of TdPeriodTimestampWithTimeZone. |
| Add(TdIntervalDayToSecond) | Adds the specified TdIntervalDayToSecond to this instance of TdPeriodTimestampWithTimeZone. |
| Add(TdIntervalYearToMonth) | Adds the specified TdIntervalYearToMonth to this instance of TdPeriodTimestampWithTimeZone. |