The day when people call out the least appears to be Friday.  
Monday is the day taken most often as a sick day.

So the odds say your team, your clients, your coworkers, your boss are probably available for the rest of the week.  (what’s your plan?) 

What cure or placebo you can share to have them bright-eyed and bushy-tailed come Monday?  Of course you need to figure out what their “illness” is first.

PS:  A great Podcast from the guys at #SYSK on the Placebo Effect was posted a few days ago on iHeartRadio and Apple Podcasts