Similar to 世界海賊口調日

Obice da 210/22

Cannone da 75/27 modello 06

Cannone da 75/27 modello 11

Cannone da 75/32 modello 37

Darwin Information Typing Architecture

Dasher (software)

Data Encryption Standard

German Equipment Works

Belyayev DB-LK

Dbx (noise reduction)

Douglas DC-1

Douglas DC-4E

Douglas DC-7

JNR Class DE10

DEC Alpha

DECnet

Der Deutsche Correspondent

One Web Day

Younger Sister's Day

European Day of Languages

International Day for the Preservation of the Ozone Layer

Respect for the Aged Day

Constitution Day and Citizenship Day