Is it permissible to produce and distribute calendars that include both the Gregorian and Hijri dates for the promotion of a company during the Gregorian New Year, without the intention of offering congratulations or participating in the festivals of disbelievers?

It is permissible to combine the Hijri and Gregorian calendars in a "planner," with the Hijri calendar presented first and highlighted, because it is the original basis upon which the rituals of Islam are built, and because its months are observed by the sighting of the crescent moon. It is obligatory to distribute them before the beginning of the Hijri year, not the Gregorian year, to avoid the suspicion of celebrating the forbidden Gregorian New Year. It is recommended that these planners be distributed at the beginning of the Hijri year to achieve the aforementioned benefits.