To write a diary entry in English, you should start by setting the scene, including the date and time, as well as your current location and mood. Then, you can describe the events of the day, including any conversations or interactions you had with other people. Be sure to use descriptive language to bring the scene to life, and don't be afraid to include your thoughts and feelings about what happened. Finally, you can reflect on any lessons or insights you gained from the day's events. Remember to proofread and edit your work to ensure it is grammatically correct and easy to understand.