How were you able to identify which period does each song represent?

You can tell the period a song is from based on what type of music it is.

Every age has had genres that defined the era such that they are synonymous with those times.

The song genre is therefore your best way to tell what period the song is from - unless of course, the lyrics mention the period.

For instance, the popular genres in different periods were:

In conclusion, the type of music will give the best clue as to the period the song is from in absence of better chronological measures.

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Hi, you've asked an incomplete question. However, I only answered from a general musical perspective.

Listening to know the type of genre.

Explanation:

Usually, the period of a song is categorized as either a modern or old school song. For example, modern-day songs are often in the Hip-Hop and Rap genres. While songs in other periods (old school) are often in the Blues and Jazz genres.