Good day, dear and highly respected developers of the beloved Blizzard company. I am writing to you because in the game Hearthstone I discovered that the achievements I receive are completed in the future, a year that has not yet come. Everything is fine with the date on my computer, it is synchronized with the Internet. I’ve been playing this game for almost 10 years now and I would like to receive something in my favorite game as gratitude for the bug I found. I am attaching a screenshot.
was already reported
very strange bug , i suspect some misconfigured server did it becouse of “standards”
https://en.wikipedia.org/wiki/Date_format_by_country
НУ извините тогда за беспокойство.
Been a few months on this one now. Hopefully it gets fixed soon
you know the way blizzard do fixes , the bug is fixed but they will not correct already assigned future dates . 
Adding to this post, the incorrect/invalid achievement dates haven’t been fixed yet.
Today is 2024-03-04 for me, but I noticed this achievement that I think I got yesterday or the day before says it was completed 2024-03-13 (a future date).
https://postimg.cc/fkbLZHkG
Current Hearthstone version is 28.6.3.195316.193541
This issue is still valid as per April 17th 2024 playing on version 29.2.0.198037 in Europe Region.
I got achivements which are listed as done 1 month into future, 2 months and 3 months.
Blizz plz, your peons are running wild. Handle it.