/etc/xdg/autostart/evolution-alarm-notify.desktop lacks MATE in OnlyShowIn: OnlyShowIn=GNOME;Unity;XFCE;Dawati; should be OnlyShowIn=GNOME;Unity;XFCE;Dawati;MATE;
Created attachment 392396 [details, diff] evolution-alarm-notify.desktop for MATE
This has been fixed upstream now in 3.13.10+ and 3.12.10+ see https://git.gnome.org/browse/evolution/commit/?id=c09c204
Nice, thanks :D Will wait for 3.12.10 as this is probably not major enough to deserve a revision bump (and 3.12.10 should be released around 12th)