1. Date of the Allied landing in France, World War II
   - D-day

Type of: date, day of the month

• genus Abrocoma
• genus Abronia
• genus Abudefduf
• genus Abutilon
• genus Acacia
• genus Acalypha
• genus Acanthisitta
• genus Acanthocereus
• genus Acanthocybium
• genus Acanthophis
• genus Acanthoscelides
• genus Acanthurus
• genus Acanthus
• genus Acarus
• genus Accipiter
• genus Acer
• genus Acherontia
• genus Acheta
• genus Achillea
• genus Achimenes
• genus Achoerodus
• genus Achras
• genus Acinonyx
• genus Acinos
• genus Acipenser