Hello Mary,
The initial items that are loaded, they are generated on the server. The other records that are loaded via callbacks by the Virtualization paging, they are rendered with JavaScript.
Here is the method that renders the DateTime and Bound columns on the client, you can use the code to debug and check the formats at the time the cells are populated. For convenience, attached is a sample runnable project that implements this, with a single DateTime column.
If you still replicate the issue, we would greatly appreciate it if you open an official support ticket where you can attach the modified project and share more details on the cultures of the server and client and the date formats on the server and client, both the actual and the expected. That would allow us to investigate locally and help you more efficiently.
Once we have a closure in the support ticket, we can share it here for convenience and better visibility from the community.
Regards,
Peter Milchev
Progress Telerik
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