They are usually held on Sundays, usually biweekly. If they don't hold an auction on a Sunday they do it on Wednesdays. The timer usually updates 3-4 days before the auction. I usually follow this pattern to get ready for auctions

And I think I misunderstood the way you used the word "regularly" so I apologize lol or maybe I did not?

My English is not that great sometimes lol