Date attribute on POCO for new .NET client not available

Hi, I hope this is the correct category. I am updating my client from NEST to the latest Elastic.Elasticsearch.Client.

With nest I was able to add an attribute to my POCO class as below...
[Date(Format = "date_time_no_millis")]
public DateTime Date { get; set; }

However this is unavailable in the latest client. What is the current best practise approach to achieve the same?

Thanks,

Does the new default serializer achieve this by default?