"She remembers the happy days."

Translation: Ŝi memoras la feliĉajn tagojn.

[thejim87]

Why does the accusative apply to remembering something? Isn't this typically for actions?

[mizinamo]

It's used for the objects of pretty much all verbs, including things such as "have" or "remember".

About the only ones that have a complement rather than an object (and so don't use accusative) are things such as "be" and "become".

[Eddygp]

Gxojajn?

[mizinamo]

That would be "joys".

Perhaps you mean "ĝojajn" instead? That would be "joyful".

[letruca]

Mi kredas ke oni povas traduki la frazon jene: ŝi rememoras la feliĉajn tagojn