The growing global phenomenon takes place each year on the first Tuesday after US Thanksgiving.
GivingTuesday, the non-profit that created the movement in 2012, says every act of generosity counts.
It tracked a record $2.7bn (£2.2bn) donated by 35 million people on Giving Tuesday in the US last year.
That was a 10% increase from the year before. It was also more than double the estimated $1.3bn or so in charitable giving by Americans on a…