date 指具体的年、月、日，或指年代、时代。
day 泛指任何一天，或指含有“一昼夜”意义的一天，也可指工作日。可用复数表时代、时期。
参考例句
1. Noon is the middle of the day. 中午是一天中间的那段时间。
2. I hope to visit Paris some day. 我希望能有朝一日参观巴黎。
3. Rub in this cream once a day. 每日一次把这''。'乳剂'。''用力擦入。
英英解释
n.
1. time for Earth to make a complete rotation on its axis
2. some point or period in time
3. the time after sunrise and before sunset while it is light outside
4. a day assigned to a particular purpose or observance
5. the recurring hours when you are not sleeping (especially those when you are working)
6. an era of existence or influence
7. a period of opportunity
8. the period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis
9. the time for one complete rotation of the earth relative to a particular star, about 4 minutes short
10. United States writer best known for his autobiographical works (1874-1935)
网络释义
Day 日间用;
白天;
日;
天;
day off 休息日;
放假日;
休假;
一天的假;
day dream 白日梦;
白昼梦;
低俗灵;
晶莹剔透;
Groundhog Day 偷天情缘;
土拨鼠日;
今天暂时停止;
偷天情缘（今天暂时停止）;
National Day 国庆节;
日 捷克与斯洛伐克国庆日-----;
国庆日;
日 中华人民共和国国庆-----;
