Achievement timestamp missing

[Simulacrum]

I got 1 achievo today. When I got it the timestamp was there. Now I see the timestamp is missing. How to I get fix this?

[cSg|mc-Hotsauce]

Issues with achievements have been going on/off for the past couple months.

Wait out the issues.

[cSg|mc-Hotsauce]

Eventually, yes.

[JJ]

Well one my achievement was unlocked late december when these server issues started. Still missing timestamp.

[Barkaya]

Yeah, this won't fix itself...
BUT, you can try this to "flush" achievement and redo it again:
https://partner.steamgames.com/doc/features/achievements/ach_guide#13
If you need to "clear" only a couple of achievements (or just one) and it's possible to re-trigger them without deleting save game (dunno how you're going to find that out though...), then better use first option (achievement_clear). Otherwise delete your current save, "flush" everything with second command (reset_all_stats) and, well, do everything all over again.
If you don't want to risk messing with Steam console commands then try to ask game dev to add a button for achievement reset to in-game options menu... or in-game console command that'll do the same thing... or something like that.
Also, ALSO, you may try to send a ticket to Steam Support (go through Help -> My Account -> Data Related to Your Account -> Contact Steam Support) asking for timestamp restoration. In one of the threads about achievement problems one user claimed that Support managed to fix his stats... so, if he didn't lie, maybe it'll work for you too...

[Mr. Smiles]

Imagine getting your jimmies all rustled by something as pointless as honey nut cheevos.

If it isn't going to fix itself, and valve clearly doesn't care, then why should you?

Cheevos...

[76561199124647935]

ddd

[葱油鲫鱼饼]

I have the same problem as you. In the past two months, I have lost the unlock timestamp of three game achievements, which makes me very uncomfortable. I also consulted customer service, but got a very disappointed answer. He told me that they could not modify the achievements, which makes me very uncomfortable!

[HEY]

A

[Barkaya]

Originally posted by Perfect Thoughts:

I just found out my missing timestamp is present in Big Picture Mode. If this data is not lost, why steam can't just sync it? Man...

Well, I asked them about it almost a 1,5 months ago. Support guy answered:
"I'm forwarding your comments about adding a time sync feature on to the appropriate department."
Maybe/perhaps/someday it'll be added...