festive

What it means

1. Having the atmosphere, decoration, or attitude of a festival, holiday, or celebration.

   The room was decked out in festive streamers, with flowers everywhere.

   1 more example

   On festive occasions away from home we softened under the influence of Christmas trees, bran pies, and conjurors.

   1938, Siegfried Sassoon, The Old Century and seven more years, London: Faber, page 35 (1968 edition)

2. In the mood to celebrate.

   Please put the Christmas decorations away, I'm really not in a festive mood.

In a sentence

The room was decked out in festive streamers, with flowers everywhere.

Where it comes from

1. Latinfestivus“pertaining to a feast, gay, lively, joyous”
2. Frenchfestif
3. Englishfestive

From French festif, from Latin festivus (“pertaining to a feast, gay, lively, joyous”). Equivalent to feast + -ive.