Specifying a custom DateTime format when deserializing json request

You can decorate the JsonConverter attribute on an as-needed basis. Json.Net already has a built-in IsoDateTimeConverter that lets us specify the date format:

class MyDateTimeConverter : IsoDateTimeConverter
{
    public MyDateTimeConverter()
    {
        base.DateTimeFormat = "yyyy-MM-ddThh:mm:ss tt";
    }
}

And use on class property:

[JsonConverter(typeof(MyDateTimeConverter))]
public DateTime timestamp { get; set; }

We can also decorate the JsonConverter attribute with datetime format as param on an as-needed basis:

class MyDateTimeConverter : IsoDateTimeConverter
{
    public MyDateTimeConverter(string format)
    {
        DateTimeFormat = format;
    }
}

And use on class property:

[JsonConverter(typeof(MyDateTimeConverter), "yyyy-MM-ddThh:mm:ss tt")]
public DateTime timestamp { get; set; }

Thanks found helpful. Use following format and worked fine for me in .netcore 3.1:

[JsonConverter(typeof(DateFormatConverter), "yyyy-MM-ddThh:mm:ssZ")]
public DateTime dateTimestamp { get; set; }