ceturtdien

In a sentence

• Es ceturtdien došos uz tirgu.

  I will go to the market on Thursday.

  Here, 'ceturtdien' is used as an adverb to denote the specific day (Thursday) when the action (going to the market) will take place.

• Katru ceturtdienu mēs sanākam kopā ar draugiem.

  Every Thursday, we gather with friends.

  In this sentence, the word form 'ceturtdienu' is a declension of 'ceturtdiena' (Thursday, the noun) used in the accusative case to indicate repetition or habitual action each Thursday.

• Līdz ceturtdienai man jāpabeidz projekts.

  I need to finish the project by Thursday.

  Here, 'ceturtdienai' is used in the dative case to express a deadline, the time by which an action (finishing the project) is expected to be completed.