Translation of "‎그날은" in English

그날은 할머니가 암 수술을 받으신 날이었거든요.

She was there because my grandmother had cancer surgery that day.

‎그날은 유난히 날씨가 궂었어요 ‎물살이 거셌죠

and I remember it was a very rough day, very turbulent.

‎그날은 문어가 절 따라오더군요 ‎그렇게 놀라운 경험은 ‎처음이었어요

One day, she was following me. And that's the most incredible thing, is to be followed by an octopus.