How?

H0tamer found this puzzle in his first advent calendar package.
He needed some time to get the two pieces apart. Goal achieved :-D

Our son M. invited us to a cold  cool garden party  :-)
It was lovely to see lots of the guests of their wedding last year again :-)
It is a lovely tradition to celebrate the first advent with family, friends, colleagues and neighbours. (See also Teba's blip)