Which of the following has the same meaning as "Halcyon"?

♦ Halcyon: (adjective)
English Meaning: A very happy or successful period in the past.
Bangla Meaning: শান্ত; দুর্যোগহীন: halcyon days/weather.

Synonyms: Quiet (শান্ত), Peaceful (প্রশান্তিদায়ক), Tranquil (শান্তিপূর্ণ), Harmonious (বৈরিতামু্ক্ত) Soothing (শীতল/প্রশান্তিদায়ক)। 
Antonyms: Agitated(বিক্ষুব্ধ), Lively (প্রাণবন্ত), Bustling (শশব্যস্ততা), Noisy (কোলাহলপূর্ণ), Excited (উত্তেজিত)।

Other Forms:
(Noun) Halcyon.

Example Sentence: 
1. So I can totally understand why someone would want to recapture this halcyon period.
2. The halcyon, a mythical bird, is said to have laid its eggs in the nautilus' shell.

অন্য অপশন,
- Having knowledge or understanding of something: Cognizant
- Extremely wet: Sodden.

Source: Lecture.