how can get DateTime From Internet (External Resource – Not From Server)

how can i get current time From Internet (External Resource – Not From Server)?
Edited
For Example From the Below WebSite :
http://www.timeanddate.com/worldclock
Reason
i will redirect my pages to a Lock page after one month (by checking DateTime.Now) and in that page user should input activation code for comming back…
for some security reasons i want to get the current Date/Time From Out Of My Server…

JavaScriptSerializer.MaxJsonLength exceeded. What’s the best practice for handling this?

I’ve got a large amound of data I’m sending down to the client using jQuery’s $.ajax() function. I’m calling a method in a ASP.NET web service that returns the JSON data. Everything is great for most searches, but when I’ve got a large data set to return I run into a issue with the JavaScriptSerializer MaxJsonLength property. What’s the best practice for handling this? I don’t want to just arbitrarily set a max length. Can I set the MaxJsonLength in the web service if the data being returned is larger than the current max or should I re-write and send down chucks of data to the client?

Optional parameters in ASP.NET web service

I have a ASP.NET web service. This web service works fine. However, the WSDL lists some parameters as optional (minoccurs = 0) and others as non-optional. Some of the optional parameters are actually not optional, others which are marked as non-optional are actually optional. I would like to fix this, but I can’t find the location where this information is coming from.