How to set an IFTTT recipe to only run at a specific time

It doesn't look like it. They have the trigger half of the solution with the Date & Time channel. You can set actions to trigger on certain days of the week at certain times. So imagine one recipe to turn your Google Voice recipe on at 9am and one to turn it off at 5pm.

However, the IFTTT channel has no actions to do anything like turn on or off a recipe. You could consider contacting them to ask if they could add these features. My guess is they've considered it and thought that either no one would use it, or it would be abused in some way.

There is a way to do it, however it can be a bit complicated and requires a unix web host with php 5, so be warned.

Step 1

The first thing you have to do is add the maker channel. You do this the same way you'd add any other channel, by clicking "channels" at the top of the page and searching for it, then clicking on it and pressing the "add channel" button.

Step 2

Create a blank php document on your webhost. It doesn't really matter where, as long as you can access it with a browser.

Step 3

What you do now, is make a recipe where your trigger activates the maker channel. Once you get your trigger set up, just click the maker channel then "Make a web request". Then type in the web URL of the document we made in step 2 in the URL field. Change the method to GET and leave the other fields blank.

Step 4

Now make a recipe that's triggered by a web request. Make the event name whatever you want, as long as you remember it. Make the "that" of the recipe whatever you want it to do.

Step 5

Now, we add code into that PHP document we made back in step 2. Add this code in, changing time time allowed (currently 6am), the pass, the time zone, and the URL where you'll change "example-key" to your key (found here)and {{event}} to the event you named in step 4.

<?php
    date_default_timezone_set("EST"); 
$time = strftime("%H");
if($time == 6){
echo exec('curl -X POST https://maker.ifttt.com/trigger/{{event}}/with/key/example-key');
}
}
?>

Save the document, and you're done.