When trying to edit or add products I get the above error message on that product page when I click Save changes.

nvalid input datetime format of value '10/10/+00201616'
I have cleared cache, tried different browsers, private brower etc I can't edit or add any products
@kwindow, thank you for your report. Could you add additional information to Preconditions section about Magento and MariaDB versions?
For example: I am using Magento v2.1.8 and the output of mysql -v is
mysql Ver 14.14 Distrib 5.7.19, for Linux (x86_64) using EditLine wrapper
Hi
Thanks v much for your email,
I have magento 2.18 and have ‘fixed the issue’ by changing the locale to en-us from en-gb I gather other people have the same issue and I found this suggestion as a workaround.
Thanks Kevin
From: Томаш Хамлай [mailto:[email protected]]
Sent: 04 September 2017 09:26
To: magento/magento2 magento2@noreply.github.com
Cc: kwindow kevin@thedars.co.uk; Mention mention@noreply.github.com
Subject: Re: [magento/magento2] Product change error when saving gives = invalid input datetime format of value '10/10/+00201616' (#10756)
@kwindow https://github.com/kwindow , thank you for your report. Could you add additional information to Preconditions section about Magento and MariaDB versions?
For example: I am using Magento v2.1.8 and the output of mysql -v is
mysql Ver 14.14 Distrib 5.7.19, for Linux (x86_64) using EditLine wrapper
—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub https://github.com/magento/magento2/issues/10756#issuecomment-326898570 , or mute the thread https://github.com/notifications/unsubscribe-auth/AMg8AnGvQtn1xPxLMVhc_Cc9xXN8pq3xks5se7P6gaJpZM4PLLGh . https://github.com/notifications/beacon/AMg8Ai0TCEqLbqxD4uDoa-RgbABc1fPIks5se7P6gaJpZM4PLLGh.gif
Hello, I got same issue after changing admin locale to vi_VN.
Could you show me how to fix this issue.
I'm using Magento-CE-2.1.9-2017-09-13-03-35-18
Thank you

This issue still exists in Magento 2.2.1
unfortunately there is still the problem,
how can they not notice it?
Hello everyone! Not reproducible on 2.1.9 from Github without language pack
I cloned Magento from http://github.com/magento/magento2ce.git (branch 'tags/2.1.9') performed steps from the issue description and couldn't reproduce it. @saivnct, I changed locale to vi_VN, but there still nothing about this issue. You are probably using some language pack. Can you provide me a link to it?
There was a similar situation with language packs and the problem was in Magento, not in language pack, but it is hard to find the problem and debug it without a pack. We need proper steps to reproduce.
@digvijay2017, @eTonki, I will try later on 2.2.1. Can you tell something about your environment? Does it happen on VPS, shared hosting or local (vagrant, docker, native) environment? I would like to reproduce it.
I'm also getting this error when saving a product. Only when the Interface Locale for the user account is set to United Kingdom.
My setup is Magento 2.2.1 (it was the same on 2.2.0), and not using composer. Running on shared hosting, centos 7.4, I've tried PHP (DSO) + mod_ruid2, suPHP and FPM/FastCGI. Also tried PHP v7.0.24 & v7.1.8. It's the same on all.
@TomashKhamlai
I do not remember if I'm using a language pack, it's been a long time, probably yes. If it can be useful, I can make screenshots on request. Let me know what you want to see (even with a private message).
Can anyone shed light on why this issue was closed, when it is clearly a major outstanding bug?
Magento v2.1.10 installed
Product is successfully saved
error "Invalid input DateTime format of value 'dd/MM/+00yyyyYY'" appears, for example:
Invalid input DateTime format of value '17/11/+00201717'
@kwindow, thank you for your report! Internal ticket MAGETWO-84064 was created to address this issue.
@kwindow, thank you for your report.
We've created internal ticket(s) MAGETWO-84064 to track progress on the issue.
I had the same issue using a custom language pack for en_GB - I resolved this by changing the "interface Locale" under system> all users >select user from English (United Kingdom) to English (United States)
This then resolved the issue and I can save dates in all forms from product special prices to custom date fields. This is a good workaround as when you deploy your site using en_gb it doesn't overwrite this admin setting
Hopefully this helps some people until a correct fix is put in place
@sjhill-rwcc thank you for participating in the conversation. It is a good workaround while we are waiting for the fix.
Unfortunately, we are archiving this ticket now as it did not get much attention from both Magento Community and Core developers for an extended period. This is done in an effort to create a quality, community-driven backlog which will allow us to allocate the required attention more easily.
Please feel free to comment or reopen according to the Issue reporting guidelines
the ticket if you are still facing this issue on the latest 2.x-develop branch. Thank you for collaboration.