se me había olvidado

I had forgotten

→ se
phrase Rare #28,381
I had forgotten Also means “it had slipped my mind.” Used when something was forgotten by me.
SP: Se me había olvidado tu cumpleaños.
EN: I had forgotten your birthday.

Se me había olvidado lo bonito que era este sitio.

I had forgotten how beautiful this place was.

Casi se me había olvidado.

I had almost forgotten.

— La canción del mar (2014)

Se me había olvidado.

I had forgotten.

— El profesional (Léon) (1994)

No abras la puerta, pero se me había olvidado que hay una segunda carta.

Don't open the door, but I had forgotten that there is a second letter.

— Jojo Rabbit (2019)

Se me había olvidado totalmente.

I had completely forgotten about it.