@tanguatlay,
An educated English speaker doesn't do anything much different than an uneducated one, Ms Tan. In a study done by the linguist William Labov, the most grammatical mistakes were found in the speech of the highly educated.
1. He will stay in my house from 10 March to 20 March.
2. He will stay in my house from 10 March - 20 March.
He will stay at my house from the 10th of March until the 20th of March.