# ObserverManager<TIdentity, TObserver>.GetDateTime

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.utilities.observermanager-2/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.utilities.observermanager-2/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core/Utils/ObserverManager.cs)

```csharp
public Func<DateTime> ObserverManager<TIdentity, GetDateTime
```

Gets or sets the delegate used to get the date and time, for expiry.