A wonderful video by Alisa Wu, the musically-talented immersion teacher at Lone Peak Elementary in Draper.

She explains: Children get confused about how to say the days in Chinese. In English we only have today, tomorrow, yesterday. But in Chinese we have:

Jin tian—today
Ming tian —tomorrow
Hou tian— the after tomorrow
Da hou tian—two days after tomorrow
Zuo tian—yesterday
Qin tian-Two days ago
Da qin tian–Three days ago

So she created a song to help
http://youtu.be/XQh_2JemJnw