な adjective
しんせん
前の職場では、止めろと言われるまでいつも残業していたので、毎日五時に退社するのはとても新鮮です。
I always worked overtime at my last job until I was told to stop, so it’s very new to me to leave work at five o’clock every day.
New and fresh is fresh (has to be new if you want it to be fresh, after all).
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.