Need help displaying 3rd, 4th, 5th, 6th timezones

sat·is·fice
ˈsatisˌfīs/

verb

accept an available option as satisfactory.
"it talks about telling you not to just satisfice but to always look for the best"
"Outlook will almost satisfice most people"

OK, two time zones was great around the invention of the telephone, but I work with people around the world and need to schedule meetings across six time zones. Does anyone know of an add-on I can use with Outlook to help out? Or alternatively, a bloody better calendar product?

I work with people around the world and need to schedule meetings across six time zones

That acknowledges the reason for aviation, military and maritime/shipping using Greenwich Mean Time/ZULU time so everyone has a common point of reference. I suppose one can use the Gadgets to add clocks to the Desktop, I have two, local and GMT. This page may help:
Best Free Multiple Timezone World Clock

I taped a spreadsheet to my monitor, but really want an add-on to Outlook or another calendar program as trying to match free time calendars, move meetings, etc. needs cross-referencing back and fourth across times in multiple geographies. It's just silly to have to a piece of paper to do this. I thought we were done with slide rules and the abacus.