The Preposition binnen
To say that something will happen "within" a certain time frame, use the temporal preposition binnen.
In formal and written German, binnen traditionally takes the Genitive case.
| The express shipping must occur within one day. | Der Expressversand muss binnen eines Tages erfolgen. |
| The warehouse was completely empty within a month. | Das Lager war binnen eines Monats völlig leer. |
With feminine time periods (like die Stunde or die Woche), the genitive and dative articles look identical (einer).
| The courier will arrive within an hour. | Der Kurier wird binnen einer Stunde eintreffen. |
binnen with the Dative Case
While the genitive is standard for singular nouns, binnen frequently takes the Dative case for plural nouns.
This is especially common when specifying a number of days or weeks without using an article or adjective. The dative -(e)n ending (e.g., Werktagen) clearly marks the plural.
| The delivery took place within two working days. | Die Zustellung ist binnen zwei Werktagen erfolgt. |
| We take care of the return shipment within three working days. | Wir erledigen die Rücksendung binnen drei Werktagen. |
Express Delivery and Opinions
Logistics and shipping use formal vocabulary, such as the verbs erfolgen (to occur) and eintreffen (to arrive), or the adverb umgehend (immediately/promptly).
| The package leaves the warehouse immediately. | Das Paket verlässt das Lager umgehend. |
If a service misses a deadline, you can share your feedback using the set phrase meiner Meinung nach (in my opinion).
When you start a sentence with this phrase, it takes up the entire first position. The conjugated verb must immediately follow in the second position.
| In my opinion, the courier was too slow. | Meiner Meinung nach war der Kurier zu langsam. |
| In my opinion, the express shipping is pointless here. | Meiner Meinung nach ist der Expressversand hier sinnlos. |