Why is it die Primetime?

Primetime ends in -e, and most nouns ending in -e are feminine: in a German dictionary, 79% of them take die.

All nouns ending in -e
Sense 1
die

Meaning

[1] The best broadcast time on radio or television when the highest number of listeners/viewers can be achieved

[1] die beste Sendezeit im Radio oder Fernsehen, wenn die höchsten Zuhörer-/Zuschauerzahlen erreicht werden können

Examples

[1] The film comes in prime time at 8:15 p.m.

[1] Der Film kommt in der Primetime um 20:15 Uhr.

Declension

1 Singular Plural
Nominativ die Primetime die Primetimes
Genitiv der Primetime der Primetimes
Dativ der Primetime den Primetimes
Akkusativ die Primetime die Primetimes

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary