This is the 182nd most frequent Persian word.
روزهای
"روزهای" means "days of" in English.
Here, 'روزهای' is combined with 'تعطیل' to indicate 'holiday days', establishing the idea of specific days for leisure.
روزهای تعطیل بهترین زمان برای استراحت هستند.
Holidays are the best time to relax.
Here, 'روزهای' is used as the plural form of 'روز', modified by 'آفتابی' to denote 'sunny days', functioning as the subject of the sentence.
روزهای آفتابی من را خوشحال میکند.
Sunny days make me happy.
In this instance, 'روزهای' is used with 'گذشته' to specify a time frame, implying 'past days' and setting temporal context.