This is the 7729th most frequent Polish word.
majówkowy
Related to May or May festivities.
*Majówkowych* in this sentence describes the memories related to activities or trips taken during the May holiday period.
Mam sporo majówkowych wspomnień z rodzinnych wypadów.
I have many memories from family trips during May holidays.
Here, *majówkowy* modifies 'piknik,' indicating that the picnic is organized to celebrate or coincide with the May holiday.
Przygotowaliśmy majówkowy piknik na świeżym powietrzu.
We prepared a May holiday-themed picnic outdoors.
The word *majówkowy* is used here as an adjective describing the mood associated with celebrations during May holidays.