632   { tzid: 'Etc/GMT-12', left: 172.5, right: 180 },  property
633   { tzid: 'Etc/GMT-11', left: 157.5, right: 172.5 },  property
634   { tzid: 'Etc/GMT-10', left: 142.5, right: 157.5 },  property
635   { tzid: 'Etc/GMT-9', left: 127.5, right: 142.5 },  property
636   { tzid: 'Etc/GMT-8', left: 112.5, right: 127.5 },  property
637   { tzid: 'Etc/GMT-7', left: 97.5, right: 112.5 },  property
638   { tzid: 'Etc/GMT-6', left: 82.5, right: 97.5 },  property
639   { tzid: 'Etc/GMT-5', left: 67.5, right: 82.5 },  property
640   { tzid: 'Etc/GMT-4', left: 52.5, right: 67.5 },  property
641   { tzid: 'Etc/GMT-3', left: 37.5, right: 52.5 },  property
642   { tzid: 'Etc/GMT-2', left: 22.5, right: 37.5 },  property
643   { tzid: 'Etc/GMT-1', left: 7.5, right: 22.5 },  property
644   { tzid: 'Etc/GMT', left: -7.5, right: 7.5 },  property
645   { tzid: 'Etc/GMT+1', left: -22.5, right: -7.5 },  property
646   { tzid: 'Etc/GMT+2', left: -37.5, right: -22.5 },  property
647   { tzid: 'Etc/GMT+3', left: -52.5, right: -37.5 },  property
648   { tzid: 'Etc/GMT+4', left: -67.5, right: -52.5 },  property
649   { tzid: 'Etc/GMT+5', left: -82.5, right: -67.5 },  property
650   { tzid: 'Etc/GMT+6', left: -97.5, right: -82.5 },  property
651   { tzid: 'Etc/GMT+7', left: -112.5, right: -97.5 },  property
652   { tzid: 'Etc/GMT+8', left: -127.5, right: -112.5 },  property
653   { tzid: 'Etc/GMT+9', left: -142.5, right: -127.5 },  property
654   { tzid: 'Etc/GMT+10', left: -157.5, right: -142.5 },  property
655   { tzid: 'Etc/GMT+11', left: -172.5, right: -157.5 },  property
656   { tzid: 'Etc/GMT+12', left: -180, right: -172.5 }  property