When the grid is configured for working with UTC on the server-side, the value sent from the filter menu on the client-side would not be properly sent to the server.
If the stringifyDates option of the transport of the data source is set, the value would still be sent in a localized date format without information for the time zone, for instance, GMT(+0300).
In case the value sent from the client is modified, the parameterMap would be called afterward and would override the modified value.
Moreover, the Kendo UI Binder on the server-side is not configured to be working with dates that have additional data for the time zone appended to the end. Therefore, sending the modified data would not be parsed correctly and FormatException error would be thrown.