
Since commit 28c535e34, we use the timezone associated with the ICalTime instead of the default timezone when converting to time_t. However while that is correct for most events, for ICalTimes that don't have a timezone associated we still want to fall back to the default timezone instead of UTC. https://gitlab.gnome.org/GNOME/gnome-shell/issues/1895
Please keep in sync with gnome-panel.