I've only been the once, in 1970, but I half remember the day song, and it included two verses not shown above.

A quick Google found a version of one of them here but I remember it as (approximately)
Where are the young men that here today should dance
For summer is a-come unto day.
Some they are in England and some they are in France
In the merry morning of May.

And I remember the other (also approximately) as
Where are the young maids that here today should sing
For summer is a-come unto day.
They're out all in the meadow, the flowers a-gathering
In the merry morning of May.

Someone here should be able to provide accurate versions as currently sung.