adverb
the day before yesterday
A2
'Vorgestern' means the day before yesterday. It's a temporal adverb used to refer to the day two days before today. It's invariable (no plural or comparative), not reflexive, and takes no specific preposition. Common in both formal and informal German to date events.
Examples
Vorgestern bin ich ins Kino gegangen.
I went to the cinema the day before yesterday.
Vorgestern kam der Lieferwagen, obwohl die Bestellung erst für nächste Woche geplant gewesen war.
The delivery van arrived the day before yesterday, although the order had only been scheduled for next week.
Details
Mnemonics
Picture a calendar and point two days back from today.
Think 'vor-gestern' = 'before yesterday' literally.
Notes
A single-word adverb commonly used to refer to two days ago.