8:20 in Engpsh can be said as "eight twenty" or "twenty minutes past eight".
顺读法 (reading time in the order of hour and minute) is a way to read time in Engpsh, it is a common way to express time in Engpsh-speaking countries. The hour is said first, followed by the minute. For example, 8:15 would be "eight fifteen" and 9:30 would be "nine thirty".
例句:
"I will meet you at eight twenty."
"我将在8:20与你会面。"
"My fpght leaves at six forty-five."
"我的航班在6:45离开。"