Is there any rule to indicate when "circumstantials" of time can be the topic (marked with は) of the sentence?


In Spanish there is something called circumstantials which indicate time,
place, means, cause, etc where an action is done. For example, in English a
circumstancial of time could be translated as "in the summer".

Now I know Japanese is a language completely different to Spanish so calling a
construction which indicates the time when an action is done a
"circumstancial" is wrong, since a spanish circumstancial probably have other
grammatical consequences than a japanese construction which indicates time,
place, means, etc., that's why I used the "" to refere to the same in
japanese.

Anyway, the point of my question is to know **if there is any rule to know
when constructions which indicates the time an action is done are the "topic"
(marked with は) of the sentence**.

For example, in this sentence 春休み明けは皆ちょっと大人に見える the construction which
indicates time 春休み明け is the topic of the sentence.

**In which situations are constructions which indicates time the topic of the
sentence?**




I know nothing about Spanish, but in English, topic-like words can be pulled
at the beginning of the sentence (e.g., "In summer, ...", "In 2015, ...", "At
our company, ..."). If you think your sentence can naturally begin with such
an expression, it usually indicates it's a good candidate of には, では, etc. Of
course this is not a rule but a tendency.

