Piątego marca kończę kurs i zaczynam nową pracę.

On the fifth of March I am finishing the course and starting a new job.

Breakdown of Piątego marca kończę kurs i zaczynam nową pracę.

• ja: I
• i: and
• nowy: new
• zaczynać: to start

Questions & Answers about Piątego marca kończę kurs i zaczynam nową pracę.

Why is the date piątego marca instead of something like piąty marzec?

Because Polish dates are normally expressed with:

• the day number as an ordinal in the genitive
• the month name also in the genitive

So:

• piąty = fifth
• piątego = of the fifth / on the fifth
• marzec = March
• marca = of March

So piątego marca literally works like the fifth of March, and in context it means on the fifth of March.

Why is there no word for on before piątego marca?

In Polish, you usually do not need a preposition for full dates like this.

So English on the fifth of March becomes simply:

• piątego marca

This is one of the standard ways Polish expresses dates.
By contrast:

• w marcu = in March
• piątego marca = on the fifth of March

So the lack of a preposition is normal.

Why does piąty change to piątego?