翻译 - 立陶宛语-英语 - AÅ¡ Å¡venčiau gimtadienį namuose.

Hi fiammara,

The noun "birthday" calls an article, possessive or plural.
So, it can be: my birthday, birthdays...

Whose birthday is the text talking about?

It was not mentioned whose birthday..

you would normally say whose birthday instead of just 'birthday'

normaly we understand from context or from which word is stressed when talking. Now I can just guess that it is ,,my" birthday.