I had the opportunity to visit Mexico City and Oaxaca city during the Dia de los Muertos celebrations which start well before the day itself on November 2nd. This is a time where family shrines are erected to remember friends and family who have passed away.
Even though Oktoberfest doesn't actually happen DURING October (no, not even in Germany!), it's a great way to ring in the new season and the harvest. Many of Ottawa's (and the region's) best restaurants get together and show their stuff.