Is it der, die oder das Nachmittag?
The correct article in German of Nachmittag is der. So it is der Nachmittag! (nominative case)
The word Nachmittag is masculine, therefore the correct article is der.
Finding the right gender of a noun
German articles are used similarly to the English articles,a and the. However, they are declined differently (change) according to the number, gender and case of their nouns.
In the German language, the gender and therefore article is fixed for each noun.
The most difficult part of learning the German language is the articles (der, die, das) or rather the gender of each noun. The gender of each noun in German has no simple rule. In fact, it can even seem illogical. For example das Mädchen, a young girl is neutral while der Junge, a young boy is male.
It is a good idea to learn the correct article for each new word together - even if it means a lot of work. For example learning "der Hund" (the dog) rather than just Hund by itself. Fortunately, there are some rules about gender in German that make things a little easier. It might be even nicer if these rules didn't have exceptions - but you can't have everything! The best way to learn them is with the App - Der-Die-Das Train! (available for iOS and Android)
German nouns belong either to the gender masculine (male, standard gender) with the definite article der, to the feminine (feminine) with the definite article die, or to the neuter (neuter) with the definite article das.
for masculine: points of the compass, weather (Osten, Monsun, Sturm; however it is: das Gewitter), liquor/spirits (Wodka, Wein, Kognak), minerals, rocks (Marmor, Quarz, Granit, Diamant);
for feminine: ships and airplanes (die Deutschland, die Boeing; however it is: der Airbus), cigarette brands (Camel, Marlboro), many tree and plant species (Eiche, Pappel, Kiefer; aber: der Flieder), numbers (Eins, Million; however it is: das Dutzend), most inland rivers (Elbe, Oder, Donau; aber: der Rhein);
for neutrals: cafes, hotels, cinemas (das Mariott, das Cinemaxx), chemical elements (Helium, Arsen; however it is: der Schwefel, masculine elements have the suffix -stoff), letters, notes, languages and colors (das Orange, das A, das Englische), certain brand names for detergents and cleaning products (Ariel, Persil), continents, countries (die artikellosen: (das alte) Europa; however exceptions include: der Libanon, die Schweiz …).
German declension of Nachmittag?
How does the declension of Nachmittag work in the nominative, accusative, dative and genitive cases? Here you can find all forms in the singular as well as in the plural:
|Nominative||der Nachmittag||die Nachmittage|
|Genitive||des Nachmittags des Nachmittages||der Nachmittage|
|Dative||dem Nachmittag||den Nachmittagen|
|Akkusative||den Nachmittag||die Nachmittage|
What is the meaning of Nachmittag in German?
Nachmittag is defined as:
 the time from noon to evening die Zeit vom Mittag bis zum Abend
How to use Nachmittag in a sentence?
Example sentences in German using Nachmittag with translations in English.
 Unser Flug startet am Nachmittag. Our flight starts in the afternoon.
 „Endlich, am späten Nachmittag, kamen Flugzeuge, einige Spitfire und Mustangs, die aus Richtung Flensburg oder Schleswig hereindrehten, um im Tiefflug über uns hinwegzuflitzen und auf die Nordsee hinaus zu verschwinden.“ "Finally, in the late afternoon, airplanes came, some Spitfires and Mustangs that came in from Flensburg or Schleswig to whiz over us at low altitude and disappear out onto the North Sea." 
 „Wir landeten am späten Nachmittag in einer kleinen sandigen Bucht.“ “We landed in a small sandy bay in the late afternoon” 
 „Es ging dann schon auf den Nachmittag zu, und ich hatte nun auch etwas Hunger.“ "It was approaching the afternoon, and I was now a little hungry too" 
 „Eines Nachmittags saß ich bei offenem Fenster in meiner Bücherstube.“ "One afternoon I was sitting in my bookroom with the window open" 
How do you pronounce Nachmittag?
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