Gets or sets the TimeTag of the time-series data.
            
| Exception | Condition | 
|---|---|
| ArgumentException | The value being assigned is not between 01/01/1995 and 01/19/2063. | 
| Exception | Condition | 
|---|---|
| ArgumentException | The value being assigned is not between 01/01/1995 and 01/19/2063. |