It is not always May.

If only it were - spring is bursting out and the dreary days of winter are fast fading from memory; birds sing, people fall in love and to be alive is joy unending. Our lives also have their seasons and the zest of youth is a veritable May. Sadly it does not last and we move into busy summer, fruitful autumn and then the snows of winter. This proverb reminds us of the need to "make hay while the sun shines". "Lost time is never found again" so you must use the energetic days of youth as fully as your circumstances permit. It also alerts us to a best time for doing things, but it does not last - so get on with what you have to do while conditions are suitable.