If you haven’t started prepping those vocal chords for the peculiar demands of the tonus sollemnior of the kalendas, well, it’s time to start now!

Open the text set to plainchant here.
Listen to Father John Zuhlsdorf’s recording of last year’s proclamation here. Note that only the elogium of the moon changes each year. Last year, it was the seventh month. This years, it’s the eighteenth moon. Bonus is the thumbnail on Father Z’s post, which came from a booklet we had typeset for the kalendas back in 2011.
Direct links: text set to plainchant and audio.