Anything I should know about Fridays?
eBay recommends not to have auctions end on friday morning as they usually schedule site maintenance and updates at this time. This can lead to all kind of unexpected effects like items disappearing from search results and customers not being able to place bids – as reported here.
The downtime in 2013 which even prevented users from logging in and WP-Lister from listing new items was actually a scheduled maintenance that went wrong – more details here.