user10401: Is there like a best time during the day to answer or ask a question? In other words, when is there the most amount of users active who can respond and/or upvote your questions and answers?

user3624: There is a blogpost by Jeff Atwood on exactly this. In it, he states:

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.
You'll have to convert those GMT hours to your local time zone, of course.
For the USA, that's:
Eastern Standard Time   GMT/UTC minus 5 hours
Central Standard Time   GMT/UTC minus 6 hours
Mountain Standard Time  GMT/UTC minus 7 hours
Pacific Standard Time   GMT/UTC minus 8 hours

It is likely that the same times are relevant for BioSE as well, but might differ a bit depending on the specific user base here (e.g. where they are located).
There are also a couple of questions at Meta-SE on this:
What is the best time to ask questions?
When's the best day and best time to post a question to Stackoverflow.com?

10401: <p>Is there like a best time during the day to answer or ask a question? In other words, when is there the most amount of users active who can respond and/or upvote your questions and answers?</p>
 3624: <p>There is a <a href="http://blog.stackoverflow.com/2009/01/the-best-time-to-ask-a-stack-overflow-question/">blogpost by Jeff Atwood</a> on exactly this. In it, he states:</p>
<blockquote>
<p>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.</p>
<p>You'll have to convert those GMT hours to your local time zone, of course.<br />
For the USA, that's:<br />
Eastern Standard Time   GMT/UTC minus 5 hours<br />
Central Standard Time   GMT/UTC minus 6 hours<br />
Mountain Standard Time  GMT/UTC minus 7 hours<br />
Pacific Standard Time   GMT/UTC minus 8 hours</p>
</blockquote>
<p>It is likely that the same times are relevant for BioSE as well, but might differ a bit depending on the specific user base here (e.g. where they are located).</p>
<p>There are also a couple of questions at Meta-SE on this:<br />
<a href="https://meta.stackexchange.com/questions/1313/what-is-the-best-time-to-ask-questions">What is the best time to ask questions?</a><br />
<a href="https://meta.stackexchange.com/questions/42572/whens-the-best-day-and-best-time-to-post-a-question-to-stackoverflow-com">When's the best day and best time to post a question to Stackoverflow.com?</a></p>
