In The Name of Allaah, The Most Merciful, The Bestower of Mercy.

The Imaam [may Allaah have mercy upon him] also said: National Day (celebration is tantamount to) an imitation of Allaah’s enemies. The National Days of celebration are an imitation. It may have occurred due a good intention and based on a judgement made by some after striving to reach the correct verdict in an affair; but what is apparent to us is that it is not legislated and it is not from that which is befitting; rather imitation of Allaah’s enemies is found within it, even if worship is not intended by way of it. As for if worship was intended by way of it, then it would be an innovation in religion, but worship is not intended by way of it; rather what is intended is to congratulate, manifest what the country has established and done, therefore, this is considered to be similar to the other days initiated by the Jews and Christians for remembrance or for other reasons. So, it is not befitting (or not permissible) to imitate them- neither in this affair nor in other than it [i.e. those affairs which the Islamic legislation has neither allowed nor legislated].(1)

Imaam Abdul Azeez Bin Baaz [may Allaah have mercy upon him] said: National day Celebration is an innovation in religious affairs [i.e. because only the two Eeds have been legislated for that purpose]. As for “Week of the Scholars”, it is not a religious innovation. During this week, their books are presented and it is not a religious innovation. It is a week in which books are presented, so it is said, “The week for the book of such and such person, the week thereafter the book of such and such, and the week after it, the book of such and such”. This is not a religious innovation. This is a presentation of books, a clarification of what such and such person has authored and the those books of his that have been printed. If it is said, “This is Muhammad’s week, this is Shaikhul Islaam’s week, this is the week of Izz Bin Abdis Salaam and Al-Qurtubee’s week, in which their books are presented, then this is not a newly invented matter into the religion, (rather) it is to present their books openly, sell and distribute them amongst the people. As for National Day and celebrating National Day on any day or celebrating the night of Raghaa’ib, then all of this is an innovation in religion and an imitation of Allaah’s enemies. (2)

[Ref 1: https://binbaz.org.sa/fatwas/2592/%D8%AD%D9%83%D9%85-%D8%A7%D9%84%D8%A7%D8%AD%D8%AA%D9%81%D8%A7%D9%84-%D8%A8%D8%A7%D9%84%D8%A7%D8%B9%D9%8A%D8%A7%D8%AF-%D8%A7%D9%84%D9%88%D8%B7%D9%86%D9%8A%D8%A9 .paraphrased]

[Ref 2: https://binbaz.org.sa/fatwas/2365/%D8%AD%D9%83%D9%85-%D8%A7%D9%84%D8%A7%D8%AD%D8%AA%D9%81%D8%A7%D9%84-%D8%A8%D8%A7%D9%84%D9%8A%D9%88%D9%85-%D8%A7%D9%84%D9%88%D8%B7%D9%86%D9%8A-%D9%88%D8%A7%D9%84%D8%A7%D8%B3%D8%A7%D8%A8%D9%8A%D8%B9-%D8%A7%D9%84%D8%AF%D8%B9%D9%88%D9%8A%D8%A9 paraphrased]