Parties (birthday,celebration) allowed or not
Praise be to Allah!
Firstly, celebrating birthdays is haram and one should not consider celebrating this event. Here are some verses and hadiths which speak about this matter.
"Then We put you, [O Muhammad], on an ordained way concerning the matter [of religion]; so follow it and do not follow the inclinations of those who do not know." [45:18]
"Follow, [O mankind], what has been revealed to you from your Lord and do not follow other than Him any allies. Little do you remember." [7:3]
Besides brithdays being bid’ah as they are not in the Quran nor in the Sunnah and having no basis in sharee’ah, these birthday celebrations also involve imitation of the Jews and Christians in their birthday celebrations. The Prophet (peace and blessings of Allaah be upon him) said, warning us against following their ways and traditions: “You would follow the ways of those who came before you step by step, to such an extent that if they were to enter a lizard’s hole, you would enter it too.” They said, “O Messenger of Allaah, (do you mean) the Jews and Christians?” He said, “Who else?” (Reported by al-Bukhaari and Muslim). The Prophet (peace and blessings of Allaah be upon him) also said: “Whoever imitates a people is one of them.”