By Using DynamicObject is to send a binder(Data) And get the data output . And also get the time date

Dynamic.cs

#region Dynamic Object 

        class dynamicClass : DynamicObject
    {
        Dictionary<string, object> _dynamicData = new Dictionary<string, object>();

        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            bool success = false;
            result = null;
            if (_dynamicData.ContainsKey(binder.Name))
            {
                result = _dynamicData[binder.Name];
                success = true;
            }
            else
            {
                result = "Property Not Found";
                success = false;
            }
            return success;
        }

        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            _dynamicData[binder.Name] = value;

            return true;
        }

        public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
        {
            dynamic method = _dynamicData[binder.Name];
            result = method((DateTime)args[0]);
            return result != null;
        }

    }


    class Program
    {
        static void Main()
        {
            dynamic dynamicProg = new dynamicClass();
            dynamicProg.FirstName = "Bug";
            dynamicProg.LastName = "Bunny";
            Console.WriteLine(dynamicProg.GetType());
            Console.WriteLine("{0} {1}", dynamicProg.FirstName, dynamicProg.LastName);

            /// Use of DateTime 

            Func<DateTime, string> GetTomorrow = today => today.AddDays(1).ToShortDateString();
            dynamicProg.GetTomorrowDate = GetTomorrow;
            Console.WriteLine("Tomorrow is {0}", dynamicProg.GetTomorrowDate(DateTime.Now));

            Console.ReadLine();
        }
    }

Can you try something like this? I think dynamicClass shouldnt be responsible for parsing your arg to a DateTime

public class dynamicClass: DynamicObject
    {
        Dictionary<string, object> _dynamicData = new Dictionary<string, object>();

        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            bool success = false;
            result = null;
            if (_dynamicData.ContainsKey(binder.Name))
            {
                result = _dynamicData[binder.Name];
                success = true;
            }
            else
            {
                result = "Property Not Found";
                success = false;
            }
            return success;
        }

        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            _dynamicData[binder.Name] = value;

            return true;
        }

        public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
        {
            dynamic method = _dynamicData[binder.Name];
            result = method(args[0]);
            return result != null;
        }

    }


    class Program
    {
        static void Main()
        {
            dynamic dynamicProg = new dynamicClass();
            dynamicProg.FirstName = "Bug";
            dynamicProg.LastName = "Bunny";
            Console.WriteLine(dynamicProg.GetType());
            Console.WriteLine("{0} {1}", dynamicProg.FirstName, dynamicProg.LastName);

            /// Use of DateTime 

            Func<DateTime, string> GetTomorrow = (param) => {
                var today = param as DateTime?;
                return today.HasValue?today.Value.AddDays(1).ToShortDateString():null;  //IM returning a null here, you can definitely hook up an exception
            };

            dynamicProg.GetTomorrowDate = GetTomorrow;
            Console.WriteLine("Tomorrow is {0}", dynamicProg.GetTomorrowDate(DateTime.Now));

            Console.ReadLine();
        }
    }