Mardon mi iros al la biblioteko post la laboro.

On Tuesday I will go to the library after work.

Breakdown of Mardon mi iros al la biblioteko post la laboro.

• mi: I
• la: the
• al: to
• laboro: the work

Questions & Answers about Mardon mi iros al la biblioteko post la laboro.

Why does Mardon end in -n?

In Esperanto, -n is not only for direct objects. It can also mark time without a preposition.

So Mardon means on Tuesday.

This is a very common Esperanto pattern:

• Lundon = on Monday
• Mardon = on Tuesday
• Venontan semajnon = next week

So in this sentence, Mardon mi iros... means On Tuesday, I will go...

You may also see marde, which is another way to express on Tuesday.
A learner-friendly way to think of the difference is:

• mardon = on Tuesday, as a time point
• marde = on Tuesday / Tuesdays, more adverb-like

Both can work, but mardon is very normal here.

What does iros mean, and why is it used here?

Iros is the future tense of iri = to go.

Esperanto verb endings are very regular:

• iras = go / am going
• iris = went
• iros = will go
• irus = would go
• iru = go!
• iri = to go

So:

• mi iros = I will go

Because the sentence talks about something happening in the future, Esperanto uses .