Inspired by ISO 8601, I thought I could re-iterate what others are saying about standardizing dates. I have been using this method for a couple years now and have since transformed my entire workflows around using dates in this format.
For example, a common folder on my computer will look like:
Imagine how easy it is to search for something?
Next time someone uses a date in a different format, link them to this page or the XKCD in the description. Or, just send them this bit of PS to run:
[Net.ServicePointManager]::SecurityProtocol = "Tls12, Tls11, Tls, Ssl3"; (Invoke-RestMethod -Uri 'https://xkcd.com/1179/info.0.json' -Method Get | Select-Object -ExpandProperty Transcript).subString(0,238)