Can you provide more info to troubleshoot such as which version you are using? How were the orders created? Was this an upgrade from a previous version? etc...
This is a recent upgrade to Magento 2.1. The orders came in from people buying our stuff on the website. Screen cap follows:

thanks--that should help narrow down the possible cause.
I have the same problem.
Same issue here as well. Using 2.1 CE.
same here
FYI I am using a database that was migrated from 1.9.2.2ce -> 2.1ce
The date format specified in the sales grid is wrong : https://github.com/magento/magento2/commit/81de258e374d387a60529001849478210fa78aab
Instead of displaying the minutes (mm), the month is displayed (MM).
The right format is MMM dd, YYYY, H:mm:ss A
edit: thanks @LucScu
Hi @RocketmanLabs , thanks for reporting this issue. Internal ticket MAGETWO-53138 was created.
Best,
Maksym
@xaviermarchegay the correct format is
<item name="dateFormat" xsi:type="string">MMM dd, YYYY, H:mm:ss A</item>
I also have this on a clean install of Magento 2.1.2
@PascalBrouwers You have to look at the xml in question: if you see the old code the issue is still present.
Hey guys, this timestamp issue is still featuring in 2.1.2 - is it going to be resolved in 2.1.3 or?
the issue is still present in CE 2.1.3
I confirm
Fixed in #8336
@vrann thank you for fixing it!
@LucScu Your suggestion works if i change it in core file. How can i do the changes without touching core files.
I tried with below steps but its not worked ::
@devtinku i suggest you to not lose your time on how to make this fix in a custom module. Keep it in the core file and add the file to git so you could see future update changes. Then wait for magento version with official fix, after this you could remove file from repo.
Internal ticket to track issue progress: MAGETWO-70771
Shure @magento-team - this bug is one year old and now you create an internal ticket to track the progress of this? Wow - would you be so kind to think about fixing bugs instead of reporting hundreds of internal tickets without any bugfix?
@magento-team Here's your weekly reminder that we're still waiting for this fix.
oh. my. gosh. how do you turn off tracking for bugs? this is embarassing.
On Fri, Aug 18, 2017 at 6:13 PM, Steve Robbins notifications@github.com
wrote:
@magento-team https://github.com/magento-team Here's your weekly
reminder that we're still waiting for this fix.—
You are receiving this because you commented.
Reply to this email directly, view it on GitHub
https://github.com/magento/magento2/issues/5651#issuecomment-323480418,
or mute the thread
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Still happens in 2.1.7....
Most helpful comment
Fixed in #8336