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Hopefully I can ask this question before it becomes "no longer relevant"...

I was looking forward to passing 400 upvotes in the 'git' tag, which I seem to have recently, but haven't been awarded the badge just yet.

My question is, when are these topic badges awarded? Is that more of a daily periodic job or some background task? I ask because I'm curious since they don't seem to work like the regular badges (awarded on next login), not because I'm being whingy and I want my shiny new badge now.

(Us high-rep users need something to look forward to!)

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IIRC, it's only checked daily. Not sure though, so this is just a comment. – Joel Coehoorn Sep 8 '09 at 19:23
    
Same as Joel Coehoorn. The only source I have is an unverified rumor. – mmyers Sep 8 '09 at 19:24
    
I think this is the first tag-badge I haven't been surprised with, so perhaps I can try to confirm when it happens. – Greg Hewgill Sep 8 '09 at 19:31
    
Duplicate: meta.stackexchange.com/questions/1716/…. Not sure which answer is the correct one though. – gnostradamus Sep 8 '09 at 19:37

From my previous experiences, my tag badges (on Meta) were awarded around server rollover time (right now around 8PM Eastern).

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That would be 0000 UTC, right? (I'm trying to remember when DST ends in EDT...) – Greg Hewgill Sep 8 '09 at 19:35
    
I'm pretty sure that's correct, Greg. Daylight savings time typically ends sometime in October..right around Halloween? – TheTXI Sep 8 '09 at 19:36
    
According to the tooltips, right now it is about 19:30 UTC. So check back in about four and a half hours. – mmyers Sep 8 '09 at 19:39
    
Between 8PM and 9PM Eastern sounds right. I can't recall exactly, but I'm pretty sure I got awarded my MATLAB badge on SO in that window. – gnostradamus Sep 8 '09 at 19:40

It looks like I was awarded the tag badge at approximately 05:00 UTC. I don't know whether this conclusively answers the question or not, because it seems like an unusual time for the badge processing to be run.

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It could at a guess relate to the system usage profile... when can we run a potentially expensive query? – Marc Gravell Sep 9 '09 at 8:44

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