Giving Tuesday
The Tuesday after Black Friday and Cyber Monday. After battling hordes of other middle aged mothers in stores or ignoring their friends and loved ones in lieu of staring at ads on a computer screen for hours on end, people wake up the next day and realize that the season is supposed to be about love and charity. So they scrape together what few pennies they have left over from the previous day's spending and donate it to cancer research.
Despite occurring less than a week after Thanksgiving, people need another holiday to remind them not to be such selfish assholes. Thus, Giving Tuesday was born.