/usr/share/applications/org.gnome.Calendar.desktop is in gnome-calendar 3.20.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | [Desktop Entry]
Name=Calendar
Comment=Access, and manage calendar
Exec=gnome-calendar
Icon=org.gnome.Calendar
Terminal=false
Type=Application
StartupNotify=true
Categories=GNOME;GTK;Office;Calendar;Core;
Keywords=Calendar;Event;Reminder;
MimeType=text/calendar;
DBusActivatable=true
X-Ubuntu-Gettext-Domain=gnome-calendar
|