Best time to shop at thrift stores?

Best time to shop at thrift stores?

Is there a best time to shop at thrift stores? Logically I'd guess that most of the donations come in from the public on weekends, so I assumed Monday mornings would be a great time. But I just came back from the Goodwill and the housewares looked really picked over. So when do thrift stores usually re-stock their goods? Is there a usual time for it? Or is it just a luck type thing? Thanks.
My favorite time of year!

My favorite time of year!

Plant Identification Help Please

Plant Identification Help Please

The good, the bad, and the tasty!

The good, the bad, and the tasty!

About to pop…

About to pop…

A few summer flowers

A few summer flowers

My garden thus far

My garden thus far