I was invited by my friend to hang out together, so I will spend time with him/her from two o'clock tomorrow afternoon.
ご質問ありがとうございます。
"I was invited by my friend to hang out together, "=「友達に遊びに誘われた」
☆"hang out"は(誰かと)時間を過ごす、という意味のカジュアルなフレーズです。
"so I will spend time with him/her from two o'clock tomorrow afternoon."=「だから、明日の午後2時から彼・彼女と時間を過ごすね。」
ご参考に。
My friend invited me out at 2 o'clock tomorrow, so I'm going to hang out with him.
この場合、次のような言い方ができますよ。
ーMy friend invited me out at 2 o'clock tomorrow, so I'm going to hang out with him.
「友達に明日の2時に誘われたから、彼と遊んでくるね」
to invite someone out「人を誘う」
to hang out with ... で「…と遊ぶ」
ご参考まで!