Combine all ingredients except pear and cinnamon in an airtight glass container and stir to combine. Refrigerate until ready to use (no more than 4 hours). At serving time, pour over ice into a punch bowl and add pear cubes and sprinkle cinnamon on top.
To make rich turbinado simple syrup, add 2 parts turbinado sugar to 1 part water and boil until dissolved. Store in an airtight container.