What are their dim sum hours throughout the week?

It depends on the location you go to. The one downtown serves it whole day. The one in archer 8am -4pm and 9pm -2am

Dim Sum 8am to 4pm Dim Sum 9pm to 2am

The Archer avenue , i found it open up to 12:00 AM.

From open to 3pm

I've been there once for office party. You might want to check their website or call