| Overload | Description | 
|---|---|
| Subtraction(TdTime,TimeSpan) | Subtracts the specified TimeSpan from a TdTime. | 
| Subtraction(TdTime,TdTime) | The time interval between two TdTimes is returned when the TdTimes are subtracted from each other. | 
| Subtraction(TdTime,TdIntervalDayToSecond) | Subtracts the specified TdIntervalDayToSecond from a TdTime. |