National Parks "seasons calendar", for year 2023. Variants of the calendar:
English, weeks starting at Sunday, Letter size, as usual in America.
seasons-calendar-2023-sunday-letter.pdf
English, weeks starting at Mondays, A4 size, as usual in Europe and other places.
seasons-calendar-2023-monday-a4.pdf
Serbian, Latin chars, weeks starting at Mondays, A4 paper size
seasons-calendar-2023-serbian-lat.pdf
Winter solstice - Wikipedia when daytime is the shortest, on Northern hemisphere.
It is also the beginning of increase of the length of each day's daytime.
A good time for a new start, and a new calendar :)