it was her birthday

Amaya Suriyapperuma initially didn't know about the memes–her friends tried to hide it from her, as it was her birthday.	Al principio, Amaya Suriyapperuma no sabía de los memes –sus amigos intentaron ocultárselos, ya que era su cumpleaños.
When checking in at the departure gate, a young woman said it was her birthday and she had a bad back.	Cuando al registrarse en la puerta de embarque, una mujer joven dijo que era su cumpleaños y que tenía problemas de espalda.
Last week I learned to say Happy Birthday, so when one of my students mentioned that it was her birthday, I jumped at the opportunity of using my new phrase!	La semana pasada aprendí a decir Feliz cumpleaños, así que cuando uno de mis estudiantes lo fue su cumpleaños, Aproveché la oportunidad de utilizar mi nueva frase!
We took Anita to dinner last night because it was her birthday.	Llevamos Anita a cenar anoche porque fue su cumpleaños.
The girl was elated because it was her birthday and all her friends had come to the party.	La niña estaba exaltada porque era su cumpleaños y a su fiesta habían venido todos sus amigos.
It was her birthday.	Era el día de su cumpleaños.
It was her birthday.	Aquel día era su cumpleaños.
I didn't see Alaia at your party. - It was her birthday, and she celebrated with her family.	No vi a Alaia en tu fiesta. - Era su cumpleaños y lo celebró con su familia.