Sun.
🇺🇸
/sʌn/
🇬🇧
/sʌn/
The first day of the week, typically a day off from work.
We always visit grandma on Sun., as it's her favorite day.
日曜日はいつもおばあちゃんを訪ねます、なぜならそれは彼女のお気に入りの日だからです。