After learning the Italian days of the week, it's useful to learn how to use them in sentences.
Before going any further, the Italian days of the week do not use capitals (unlike in English) unless used at the start of a sentence.
Normally in Italian, the article is not used with the days of the week, unless we are describing an action that we do regularly.
Oggi è lunedì. 'Today it is Monday.'
Domani è mercoledì. 'Tomorrow is Wednesday.'
È venerdì. 'It is Friday.'
Again, the article isn't used.
I miei amici sono arrivati lunedì 'My friends arrived on Monday'.
Mia sorella è venuta a trovarmi marted 'My sister visited on Tuesday'.
Sabato è andato in farmacia 'On Saturday, he went to the chemist'.
In Italian, if we are doing something regularly on a particular day, the (definite or indefinite) article is used, as you can see in the examples below.
Al giovedì vado a cantare in un coro 'On Thursdays I sing in a choir'.
Cosa fai di solito al sabato? ' What do you usually do on Saturdays?'.
Non uscivo neanche il sabato 'I didn't even go out on Saturdays'.
Alla domenica va in chiesa 'He goes to church on Sundays'.
Generalmente in Italia non si lavora la domenica 'Generally in Italy (people) don't work on Sundays'.
There is another way to describe a recurring event on a specific day of the week, which is with the preposition di.
Di venerdi ... 'On Fridays ...'.
A volte di domenica vado a giocare a tennis 'I sometimes play tennis on Sundays'.
In these sentences, di has the same effect of using the definite or indefinite article.
Dal lunedì a giovedi 'From Monday until Thursday'.
Dal martedì a giovedi 'From Tuesday until Thursday'.
Il Prossimo lunedì 'next Monday'.
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