Does anyone know of an easy way to determine when my warranty expires?

When I was in for service in the Spring, I was told that it ended in October. Unfortunately I dont know if that is at the end of the month or on a specific date. I have an appointment set for monday (the 1st) because the ol' 6-speed has decided to start doing its "popping out of first thing again".

Is there possibly a number that I can call or a website that I can visit to get the exact date?

Thanks in advance for all of your help.