Economic risk is a nebulous term with a variety of definitions. In a nutshell, it is the risk that an endeavor will be economically unsustainable, for a variety of reasons ranging from a change in economic trends to fraudulent activities which ruin the outcome of the project.
The summer solstice arrives Sunday June 21. Those of us in the Northern Hemisphere know it as the longest day of the year.
In the northern hemisphere, the longest day of the year is 21st June and the shortest day is 22nd December. The exact date can vary by a day or so. The same dates apply in the southern hemisphere, but with longest and shortest reversed. The summer solstice is the longest day of the year; the winter solstice is the shortest. In the northern hemisphere, the summer solstice is generally June 21, and the winter solstice is December 21. (Reverse these for the southern hemisphere.)