What time do stores have to lock up alcohol and not sell it in illinois?

i know that bars generally close at 2 am, and that on saturday night, a store isnt allowed to sell alcohol from 2 am sunday morning til 11 am sunday morning, but what about the rest of the week? what time does a store have to stop selling alcohol on a monday, or a tuesday night in illinois?
Answers:
Bars must be closed on daytime so that minors will not be tempted to buy alcohol from said establishments.

---

well i live in missouri and i know that the cut off time is 130... maybe its the same there. and thats everynight...:) happy drinking

---

The time stores stop selling is based on city and county law.