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Best Time to Ask Questions

When's the best day and best time to post a question to Stackoverflow.com?

Although I know that Stack Overflow is not US-only, I'd suspect that the majority of its users are US based, so perhaps late in the day (EST or PST) would have the most active users generating the smartest answers?

Or, is the above assumption incorrect, and there is a more non-US-centric timeframe that generates the best answers?

Or, does the day and time not matter, and users get intelligent and meaningful responses from this terrific community 24/7/365?

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migrated from stackoverflow.com Mar 17 '10 at 20:15

This question came from our site for professional and enthusiast programmers.

marked as duplicate by fretje, Adam Davis, mmyers, Timothy Carter, perbert Mar 17 '10 at 20:59

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Related: Where in the world do StackOverflow users say they are from? meta.stackexchange.com/questions/25598/… –  Pëkka Mar 17 '10 at 20:19
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dupe: meta.stackexchange.com/questions/1313/… –  fretje Mar 17 '10 at 20:38
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Also: meta.stackoverflow.com/search?q=best+time+to+ask+question Of course none of these would show up in the title search on SO since they are on meta, but SO certainly warned about this being a subjective question. –  Adam Davis Mar 17 '10 at 20:42

3 Answers 3

up vote 7 down vote accepted

For when most posts occur, there is actually a blog post about this.

Looks like the most popular time to post is between 15:00 and 22:00 GMT/UTC, at least for all Stack Overflow data between launch and today.

If, on the other hand, you want to know when the most accepted answers are posted (thanks @Frank), the answer is the 15:00 hour (in UTC). I did a little playing around with the latest data dump and ran the following query:

select date_part, count(*) from (select  date_part('hour', a.creation) from sf.posts q inner join sf.posts a on q.accepted_answer = a.id ) q group by date_part order by count DESC

Here is a quick chart with this data: Google chart showing data from above query

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That's the most popular time for POSTs. I would love to know the best time of day that has the minimum timespan until and accepted answer. Smart creatures we are, the two are probably correlated, but it would be a fun stat to calculate. –  Frank A. Krueger Mar 17 '10 at 20:22
    
@Frank I think my update ought to answer your question. THis shows when the answers that were later accepted were posted. So this doesn't answer "When are questions most quickly answered?", rather it answers "When are the right answers posted, where 'right' means the answer that will be accepted? –  pkaeding Mar 17 '10 at 22:20

US East Coast Time, early in the morning.

Which is very early my time (Alaska).

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I'd assume it depends on what you're asking, different tags have different activity curves over time.

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