I wore miniskirts when I was younger. We used to hide them in our bags before going out. And we wore bloomers underneath because we danced rock ‘n’ roll. Then we went from very short to very long, and one day when I was wearing one of those long skirts, my grandmother said to me: “Good lord, you look like a musty old granny!” That was the end of that.
France’s First Lady, Brigitte Macron. Quote from Elle magazine, originally published in French Elle and translated from French.
That was the end of that all right. Almost every photo I found of Ms. Macron she was in a short dress. In the other photos she sported straight-leg jeans.
The hemline might be a bit short but otherwise, I think the look suits her and is appropriate for her position as First Lady.
At age 66 she is anything but a musty old granny!
OverDressed for Life 
In the 80’s, I wore a long grey skirt to work and a Little House type blouse. A man I worked with said I looked like a schoolmarm and I never wore those items again. Sometimes honest feedback is helpful!