mrpopstar
Sparkly Dude
I've been misquoted! Hah.Yes, on your turn. You can’t move when it isn’t your turn, except with the Ready action.
I believe you meant to respond to Overgeeked.

During a round, each participant in a battle takes a turn. The turn referenced under Dash is the current turn, therefore your turn.Dash says "current" turn not player turn:
"When you take the Dash action, you gain extra movement for the current turn. The increase equals your speed ...."
So if you ready a dash action, you take the dash action whenever the trigger happens and get extra movement on that turn when it is triggered. So you can move up to your speed on your turn and ready an action to dash and then move your speed on the turn the trigger event takes place as well.
On a typical character this is going to be up to 30 feet on your turn and up to 30 feet on the turn the trigger event happens. What you can't do is save any movement from your turn. So if you move 10 feet and then ready dash, you can still only move 30 feet when the trigger happens.
I could see using this to lure someone towards you and then moving away before they get to you, thereby wasting their movement.
These are great examples! Thank you!This is strictly not true. The environmental conditions can change between your turn and the readied action. A real common one is it is my turn and my player is in plain sight but someone is going to cast darkness, fog cloud or cast invisiblity on me.
Also for a lightfoot halfling using naturally stealthy - ready an action to hide as soon as a medium sized creature walks in front of him breaking line of sight (this does not work for non-halflings).

I was literally giving myself the "return to the narrative" talk while thinking this through. LOLHiya!
Well that's 'cause yer doin' it wrong, young feller!
Basically, yeah, you're over thinking it. You are approaching it all from the mindset of a wargamer playing in a tournament. This is D&D...a roleplaying game...with the Pirates Code used to decide the specifics. (re: "The code is more like what you'd call guidelines, than actual rules...").
In stead of trying to think of the "action" first, then adapt it to the situation, do it the other way; think of the situation first, then adapt the action to fit it. You'll find running a game much more free-flowing, surprising and fun (well, at least I do!).
In other words...
Don't do this: "I'm going to use the Ready action to...", then try and adjust the situation to fit the Ready action.
Instead, Do this: "I'm going to do this...", then adjust the Ready action to fit the situation.
Honestly, I've just never given the Ready action its due reconsideration in light of 5e and I was shocked at how same-subtle-different it was compared to 3e. I've probably adjudicated incorrectly a million times in the past 6ish years!

It explicitly says otherwise...Yes, and it’s explicit. You can ready a dash and use it to move when the reaction is triggered.
Question: "If you ready the Dash Action, can you then move up to twice you speed in reaction to the trigger?"
Answer: "Dash gives you extra movement. Off your turn, you have no movement. E.g., 0 ft. + 30 ft. = 30 ft., not 60 ft."
Follow-up question: "So do you actually move as part of the dash action? Or does dashing just allow you to move more?"
Answer: "It just lets you move more."
