Perennial

1. Lasting or remaining active throughout the year, or all the time.
2. (botany, of a plant) Having a life cycle of more than two years.
3. (figuratively) Continuing without cessation or intermission; perpetual; never failing. Synonyms: perpetual, permanent, unceasing
4. (figuratively) Enduring; lasting; timeless. Synonyms: timeless, everlasting, perpetual; eternal
5. (figuratively) Recurrent; appearing or recurring again and again. Synonyms: recurring, repetitious; repetitive