Muslims conforming to the disbelievers in the Gregorian calendar rather than the Islamic one.

The Shaykh : And nothing is closer to illustrating what is appropriate in this month regarding the calendar than the fact that most Muslims today consider the disbelievers' European calendar, even though we have an Islamic calendar established by one of the Rightly Guided Caliphs, associated with a great occasion in Islam, which is the Hijrah. Yet it is neglected by many people, to the extent that some of those who come to this country say, "We did not know the names of the Arabic months except in this country," because they only know August and the like. Yes, in any case, I say that the disbelievers rejoice when Muslims conform to this date, and they would be willing to do something great for the sake of this conformity. Yes.