Days of the week (poniedziałek, wtorek...)

Saying "On" a Day

To say you do something "on" a specific day, use the preposition w (or we) followed by the Accusative case.

• Masculine days (poniedziałek, wtorek, czwartek, piątek) do not change their form.
• Feminine days (środa, sobota, niedziela) change their ending from -a to -ę (e.g., w środę).

For easier pronunciation, w becomes we before wtorek.

Telling Time: "At" an Hour

To say "at" a specific hour, Polish uses the preposition o followed by the Locative case of an ordinal number (literally: "at the first hour").

Because godzina (hour) is feminine, ordinal numbers take feminine endings. In the Locative case, these end in -ej:

• pierwsza ➔ o pierwszej (at one)
• druga ➔ o drugiej (at two)
• trzecia ➔ o trzeciej (at three)

The Weekend and Later Hours

The weekend days—sobota (Saturday) and niedziela (Sunday)—are feminine, so they also take the -ę ending (w sobotę, w niedzielę).

For the hours four (czwarta) and five (piąta), the Locative ending is also -ej (o czwartej, o piątej).

Ordinal Numbers in Other Contexts

Ordinal numbers act like adjectives, changing their endings to match the noun they describe:

• For neuter nouns in the Nominative case (like spotkanie or piwo), they end in -e (pierwsze, piąte).
• For feminine nouns in the Accusative case (like kawę), they end in -ą (trzecią).