This is the 810th most frequent Lithuanian word.
šeštadienio
"Šeštadienio" means "Saturday's" or "of Saturday" in English.
In this sentence, 'šeštadienio' refers to 'Saturday's' or 'of Saturday', functioning as a possessive form describing 'morning' (rytas).
Šeštadienio rytą mes grįžome iš kelionės.
On Saturday morning, we returned from the trip.
Here, 'šeštadienio' conveys the idea of time during certain Saturdays (Saturday evenings, specifically), indicating habitual action.
Mano draugas dažniausiai skambina šeštadienio vakarais.
My friend usually calls on Saturday evenings.
In this sentence, 'šeštadienio' indicates possession, referring to the activities associated with Saturday.