英文日记的格式通常包括以下几部分：

日期：在日记的第一行，写下当天的日期，星期几，以及当天的天气情况。例如：“Monday, July 19, 2023 - Cloudy”。

标题：可以给日记加个标题，例如：“My Diary”或者“2023年7月19日 我的一天”。

正文：在日记的主体部分，可以按照时间顺序描述当天的活动和感受。例如，可以在日记中记录自己的日常活动、情绪变化、发生的事情等。

以下是一个简单的英文日记示例：

Monday, July 19, 2023 - Cloudy

Today was a bittersweet day. I started out feeling a little down after receiving some bad news about my job. But then I decided to pull myself together and make the most of the day. I went for a long walk in the park and took some photos of the beautiful flowers. The walk really helped to clear my head and lift my spirits. Afterwardsd, I met up with a friend for lunch and we had a great time catching up on each other's lives. I feel much better now and am looking forward to what the rest of the day holds.

明天见。