perjantai

Etymology
Borrowed from, from.

Since Finnish historically lacks f and initial consonant clusters (such as fr), the word was adapted to fit the language's phonological rules. These changes can be imagined as *freja => *pereja => *perja (On the first step, F turns to P, and an epenthetic vowel appears to avoid the cluster [PR]. Then, on the second step, the unstressed vowel is dropped). For the -antai ending, compare and.

Noun

 * 1) Friday day of the week; the fifth day of the week in Finland and in the ISO 8601 standard