Questions & Answers about Hodie unum carmen breve recitandum est.
Hodie means today, and it is an adverb, so it does not change its form.
Putting it first gives it a little emphasis, like As for today... or Today, ... in English. Latin word order is flexible, so hodie could appear elsewhere, but the beginning is a very natural place for a time word.
Recitandum est is the gerundive of obligation with est. This construction is often called the passive periphrastic.
It means something like:
- must be recited
- has to be recited
- is to be recited
So the sentence is not just saying that a recitation is happening; it expresses necessity or obligation.