praznični

1. holiday
   Praznični dani su prošli prebrzo. — The holidays went by too fast.
   Tokom prazničnog vikenda prodavnice rade kraće. — Shops have shorter hours over the holiday weekend.
2. (of mood, atmosphere) festive
   U gradu vlada praznična atmosfera. — There's a festive atmosphere in the city.
   Svi su bili u prazničnom raspoloženju. — Everyone was in a festive mood.

Don't confuse with prazan "empty": praznični comes from praznik "holiday".