Definition

"Week" is an English noun, and its Chinese meaning is "week."

Chinglish meaning

星期一    Week One / Week 1         Monday
星期二    Week Two / Week 2        Tuesday
星期三    Week Three / Week 3     Wednesday
星期四    Week Four / Week 4       Thursday
星期五    Week Five / Week 5        Friday
星期六    Week Six / Week 6          Saturday
星期日    Week Seven / Week 7   Sunday

Example usage

Week One: I have a meeting on Week One  (我周一有个会议)
Week 7: The deadline is Week 7  (截止日期是周日)

Similar usage

Day One    Monday
Day Two    Tuesday
Day Three    Wednesday
Day Four    Thursday
Day Five    Friday
Day Six    Saturday
Day Seven    Sunday