interface_build {
    {r3.timestamp} 0
    {Print, add, or remove timestamp for a grid3D file (see documentation for timestamp formats).}
    {entry grid3d {Input grid3D file file for which timestamp will be modified:} 0 raster}
    {entry date {String (in quotes) specifying timestamp, timestamp range, or none (to remove timestamp):} 0 ""}
}