Meaning: The name of the 13th month in a new calendar that apportions the human year into 12 months of 30 days each. The reminding 5 or 6 days will fall under the month of Leftember. The idea behind this initiative is to give 12 months of the same duration.
Usage: The whole planet deserves a break in Leftember.
Origin: Calendar proposed by Anantha. The word leftember is derived from 'month with left over days'. That's Left + -ember (the most used suffix to cue month).