在rails db中存储一周中的一天(mon, tue, wed，…)并与今天进行比较

I am developing a rails 3.1 app where I need to store opening hours for stores. I want to store opening time, closing time and the day of the week. My first idea is to store a day number where 1 is monday and 7 sunday but is there a better approach which is more suitable when I want to internationalize my application? If i store the day number, how can I compare it with the day of week today to check if the store is open or not?I am developing a rails 3.1 app where I need to