also: バースディ · バースデイ
noun
Standard loanword for 'birthday', used in casual and commercial contexts. Often appears in compounds like バースデーケーキ (birthday cake) or バースデープレゼント (birthday present).
今日は私のバースデーです。
Today is my birthday.
友達にバースデーカードを送った。
I sent a birthday card to my friend.
Most common katakana spelling for 'birthday'.
Less common katakana variant.
Alternate katakana spelling, also common.
The standard native Japanese word for 'birthday', used in both formal and everyday situations. バースデー is a more casual, trendy loanword often used in marketing or informal speech.
Loanword from English 'birthday'.