PHP / MySQL：模拟数据库中的重复事件，但查询日期范围

I'm working on a (what I was intending to be) simple PHP/MySQL app. As part of it I'd like to be able to model repeating events, however I need to be able to query all the events that happened between two dates (including repeated events). The events only have a date, the time of day doesn't matter.I'm working on a (what I was intending to be) s