def date_header():
    dt = datetime.utcnow()
    header = dt.strftime('%a, %d %b %y %H:%M:%S GMT')
    return header
When filled contours are enabled, the mapper should use the
dataset/ETHPy150Open glennyonemitsu/MarkupHiveSDK/sdklib/api.py/date_header--crossover with--dataset/ETHPy150Open enthought/mayavi/mayavi/modules/contour_grid_plane.py/ContourGridPlane._filled_contours_changed