<p>My <a href="https://stats.stackexchange.com/q/334010/190765">very first question here</a> has been closed as "unclear what you're asking".</p>

<p>The "How to Ask" section says</p>

<ul>
<li>Is your question about statistics?
<br>As far as predictions belong to statistics.</li>
<li>We prefer questions that can be answered, not just discussed.
<br>And so do I.</li>
<li>Provide details. Share your research.
<br>I posted everything I could. I could do more, but with little effect:

<ul>
<li>I could invent some ad doc data-clustering algorithm, which might fit the bill, but I'd prefer some more scientific approach - where I have nothing to say.</li>
<li>I could implement some machine learning, but that seems to be an overkill for this task.</li>
</ul></li>
</ul>

<p>The task at hand is really specified as I wrote: Do some prediction, it's clear that it can't be perfect.</p>

<p><em>I surely agree that my question could use some more details and I'll gladly add them. However, I disagree that it can't be answered.</em></p>

<h1>Reply to comments by Glen_b</h1>

<blockquote>
  <p>I think your question still seems pretty vague about what precisely is required</p>
</blockquote>

<p>This is no research task with some error function to be minimized. There's a customer's wish to "make some predictions", so I'm trying. I'm sure, I'm not the only one and actually, I'd expect this to be well-known problem. I'm well aware that given the tiny and irregular data sets, not much can be done. OTOH <em>something</em> can be done and the quality of the result can be evaluated on the current and future data.</p>

<blockquote>
  <p>it talks about how something "seems"</p>
</blockquote>

<p>I was deliberately using such phrases as I'm only describing how I <em>think</em> the output for a given data set should look like. A different output is acceptable.</p>

<blockquote>
  <p>guess how that might generalize for your feelings about how things seem</p>
</blockquote>

<p>You don't need to generalize my feelings, just provide <em>any</em> solution. Or multiple solutions. Imagine, I was asking about how the sequence <code>1, 2, 3</code> continues. You could tell me, that it's impossible to tell, and it'd be correct. <em>Correct but useless.</em> Or you could point me to the arithmetic progression and Fibonacci series and whatever and I could try it and verify the predictions using future data.</p>

<blockquote>
  <p>an answer would rely too heavily on opinion about how to interpret it</p>
</blockquote>

<p>So don't be scared and give me <em>some</em> answer. It may fit and then we're done. Or it may not, and then I'll see what I've missed.</p>

<p>If there wasn't the problem with events around midnight, I'd simply determine the most common weekday (using some decay) and compute the average time and then look how good it works. I guess, this alone would allow to predict the next event with some 80% certainty and two hours tolerance in half the data sets (some data sets contain events happening bi-weekly, etc.) and even this could be an acceptable solution for now.</p>

<h1>Reply to the answer by Scortchi</h1>

<blockquote>
  <p>You seem to be part-way through developing a heuristic method for prediction</p>
</blockquote>

<p>Actually, I still haven't really started besides extracting the input data and analyzing maybe six data sets manually.</p>

<blockquote>
  <p>it's concerning that my knee-jerk prediction for the first example is quite different from yours</p>
</blockquote>

<p>Yours is equally valid. In fact, it's something I haven't though about. And the data continues: 180320-Tue-2222. So you were right.</p>

<blockquote>
  <p>the importance of providing context</p>
</blockquote>

<p>IIRC you're the first telling me about it. I simply left the context out, as I don't think it's important <em>for this question</em> (though it surely is for many others). I may be right as you lacking context could make a better prediction than me.</p>

<blockquote>
  <p>Can you share the data?</p>
</blockquote>

<p>I guess so, I'll ask.</p>

<blockquote>
  <p>(tons of question)</p>
</blockquote>

<p>I'll answer them in the question.</p>

<blockquote>
  <p>leading to a mare's nest of conflicting answers</p>
</blockquote>

<p>I really don't think, it'd be a problem. I may be wrong...</p>

<h1>Summary</h1>

<p><em>I'll reword the answer, provide the context and add lots of data. We'll see if it helps.</em></p>
