What is the antonym of 'Perennial'?

Perennial (adjective):
Bangla Meaning: বারোমেসে, দীর্ঘস্থায়ী, দুই বছরের বেশি জীবৎকালীন।
English Meaning: Lasting a long time, or happening repeatedly or all the time.
Synonyms: Everlasting, Perpetual, Eternal, Abiding, Ageless, Timeless.
Antonyms: Antiquated, Obsolete, Ceasing, Halting, Temporary.

Other Forms: Perennially (adverb).
Example Sentence:
1. The food menu changes daily, but the 'Macadamia Nut Crusted Halibut' is a perennial favorite.
2. This variety of oregano is perennial.

Source: Website Lecture.