It's not difficult - all you have to do is stay quiet for two minutes.
But inevitably, someone broke the Armistice Day silence with a wholly inappropriate tweet. This year's winner was actor Warwick Davis.
The fawning freebie thank you tweet from a celeb is a bit of a cringer at the best of times but especially so when the nation is united in remembering its fallen dead.
But Davis did promptly apologise...
My sincere apologies for what appeared to be an ill-timed Tweet earlier today. I was not aware of todays 2 min silence. I will never forget.— Warwick Davis (@WarwickADavis) November 11, 2014
I had actually written the Tweet much earlier but it had not sent. The app then sent when there was an internet connection at 11:01. Sorry.— Warwick Davis (@WarwickADavis) November 11, 2014
But not before he came in for a few scathing words...
I mean, FFS. It's not difficult. Tweeting thanks for your free suitcases?— fleetstreetfox (@fleetstreetfox) November 11, 2014
To be fair, Warwick Davis does work in telly.
He probably thought he could do his two-minute silence on +1.— Ian Hyland (@HylandIan) November 11, 2014
Lest we forget our toothbrush, Warwick Davis.— Adam Postans (@couchpotatoadam) November 11, 2014
Surprised that Warwick Davis didn't give them a bigger plug and tweet during the two-minute silence: "We will Samsonite them on the beaches"— Adam Postans (@couchpotatoadam) November 11, 2014
A bit more effort next year Warwick please...