To say ‘my birthday is’ in Spanish, you would say ‘mi cumpleaños es’. This phrase is used to indicate the date of your birthday followed by the actual date.
For example, if your birthday is on July 10th, you would say ‘mi cumpleaños es el 10 de julio’. In this sentence, ‘mi’ means ‘my’, ‘cumpleaños’ means ‘birthday’, and ‘es’ means ‘is’. The word ‘el’ is used to specify the date that follows.