In US English, an afternoon snack is the best term I know of.

In the UK, there are lots of options, but they’re fraught with geographic and social connotations.

Afternoon tea will be understood everywhere, but seen in some places as upper-class; it’s traditionally not a full meal, but just eg a piece of cake or a sandwich and a cup of tea or coffee.

High tea is probably most analogous to brunch; it’s a light early-evening meal, usually had instead of rather than as well as dinner, and like with brunch/breakfast, someone who eats dinner or supper most evenings might well have high tea instead once in a while. High tea also has slight upper-class connotations in some areas, I think, but not everywhere.

Tea on its own can mean many things; to many people in the Midlands and the north of England, it means something like this, the main evening meal, but typically eaten rather earlier in the evening than people who call it dinner would eat. This usage used to have strong working-class connotations in the past, but now is more of a geographical distinction, I think.

While on the subject, there’s also supper; for some people again, supper means the main meal of the evening (I was brought up that way), while for others, who had probably dinner or high tea as their main meal, it’s a late-evening snack.

This is a run-down off the top of my head; there are almost certainly some nuances and distinctions I’ve missed. Whole dissertations have probably been written on the hermeneutics of English mealtime terminology…

From publication: Running head and footer.

Running sections?

Edit So this would become div.Running or equivalent.