How to make screen time limits work

I would check the system clock and see what time it's set to

Hi there,

to be sure check if the Screen time settings are correct at: https://account.microsoft.com/family/

After that have your son's account Sign out and Sign in again on the console.

Also be sure to have the console do a full power cycle via the following steps:

try the manual power cycle steps like mentioned on the following link, be sure to wait until the power supply light turns and remains orange for at least 30 seconds before powering on again:
http://support.xbox.com/en-us/xbox-one/console/power-cycle-console

Let us know the results

I have tried all of those things but it still won’t work. I have signed out of everything, my account and child’s. We have restarted everything as well. No updates are needed. It worked fine until yesterday.

Hello JennaEsposito,

Thank you for posting here on on the Xbox forums. We understand that the screen time limits you have set are not working correctly. How do you have them set up? Do you set it for a specific time of the day, or are you allowing him certain amounts of time
randomly? Do you ever get emails asking for exceptions to screen time?

Let us know any more details we may be missing and we will try our best to help you troubleshoot this.

Thanks again.

Hi Cerulean,

Thanks for reaching out to us here on the Forums!

Now when you mentioned trying all the suggested fixes, what steps did you take to correct the issue?
If screen time isn't working the way you expect it to, keep the following in mind:

• With the latest update of Windows, you're able to set up one schedule that'll apply across all of your child's devices. This means if you give them five hours in a day, they'll have five hours between their Xbox One and Windows 10 devices. Otherwise,
  time gets tracked separately, so 1 hour of screen time means 1 hour per device.
• Check to make sure your family’s devices have the latest Windows updates by selecting the
  Start button, then selecting Settings
  > Update & Security > Windows Update
  > Check for updates and installing any available updates. If you're on your child's device now,
  check if it needs an update.
• Try rebooting your family’s devices. Select the Start button, then select
  Power > Restart.
  
• Make sure your child is signed in with their Microsoft account on their device. If they are, you can check to make sure their account is syncing up right. Select the
  Start button, then select Settings
  > Accounts and follow the prompts to verify their account.
  

Give this a try and let us know how it goes