The Messenger of Allah—may Allah bless him and grant him peace—replied,
“O Abu Bakr, every people has its festival, and this is our festival.”(1)

In another wording he said,
“O Abu Bakr, every people has its festival, and our festival is indeed this day.”(2)

Al-Bukhārī and Muslim likewise relate that he said,
“Leave them be, Abu Bakr, for these are days of festivity,”—and those days were the Days of Minā.(3)

From this report several points of evidence emerge:

First: His statement, “Every people has its festival, and this is our festival,” establishes that each community is exclusively bound to its own festival. In the same way that Allah, Exalted is He, says,
“For everyone is a direction toward which he turns” (Q 2:148),
and,
“For each of you We have appointed a law and a method” (Q 5:48),
the preposition “for” (li-) denotes exclusivity. Thus, if the Jews have a festival and the Christians have a festival, those festivals belong solely to them; we do not participate in them, just as we do not share in their qiblah or in their religious law. By the same token, therefore, we do not allow them to participate with us in our own festival.