Why historians use named eras instead of dates alone

Why do historians give periods names such as the Elizabethan era or Stuart age instead of relying only on dates and centuries?

Historians tend to be more comfortable with words than numbers, and names give books catchy titles. They also allow for changes that blend across dates without a sharp calendar boundary.

Named periods suit a profession that often works more comfortably with words than with numbers. They also give books catchy titles that help sell them. An era name can remain deliberately flexible. Historical change does not switch direction on the first day of a century. Practices develop and fade at different speeds, leaving few hard edges. A named era can describe a broad pattern without pretending that everyone began acting differently at midnight on a chosen date.