This is a lovely Advent gathering song in the Northern Hemisphere. It is a weird anachronism in the Southern Hemisphere. That is not the fault of Ruth Duck, the lyricist, as she is allowed quaint, inculturated songs for her local area as much as anyone, but everyone knows this time of year means heat and bush fires and uncomfortable sticky nights. It would never be sung in Australian Advent.
Lori True write the music and the sheet music is sold at GIA, where the text is in their preview.