Lunedì, se non piove, vado in biblioteca a piedi.

On Monday, if it doesn’t rain, I’ll go to the library on foot.

Breakdown of Lunedì, se non piove, vado in biblioteca a piedi.

• io: I
• in: in
• andare: to go
• non: not

Questions & Answers about Lunedì, se non piove, vado in biblioteca a piedi.

Why is Lunedì capitalized here? I thought days of the week are usually lowercase in Italian.

They usually are lowercase in Italian: lunedì, martedì, mercoledì, etc.

Here it is capitalized simply because it is the first word of the sentence. So inside a sentence you would normally write:

Vado in biblioteca lunedì, se non piove.

Also notice the written accent: lunedì ends in an accented -ì.

Why is there no article before lunedì?

Italian normally uses weekdays without an article when talking about one specific Monday:

Lunedì vado in biblioteca. = On Monday / Monday I’m going to the library.

If you use the article, it often means a habitual action:

Il lunedì vado in biblioteca. = On Mondays I go to the library.

So in your sentence, lunedì refers to a particular Monday, not every Monday.

Why are there commas in Lunedì, se non piove, vado...?