They ask you about the new moon. You say: “It is the timelines for mankind and the pilgrimage. And there is no virtue for you entering the houses through the back doors, but indeed, the virtue is in becoming heedful, and you enter the houses through their proper doors, and you heed Allah, so that you may become prosperous.
The Impartial Lord has given man the freedom either to be grateful or ungrateful. So, anyone who transforms his Jinn soul-mate mentioned in verses 43: 36-39 into a believer with the Permission of the Lord Adhikr, can keep the Lord in his heart and become heedful.
“You enter the houses through their proper doors” means a man should have an open and straight attitude in every subject without any crookedness, and be conscious that the Lord is the Acquainted Observer of everything. Verses 3: 130, 200; 5: 35, 90, 100; 7: 69; 8: 45; 22: 77; 24: 31 and 62: 10 also end as: “So that you may become prosperous”.
The aimless hypocrites and their heedless followers are keeping Kafir Satan in their hearts. So they are the people to the Hellfire among mankind as told in verse 15: 44. These Fujjar even didn’t know the fact that days are not changing anywhere in the world. So they are observing fasting, pilgrimage, and Eid on different days all around the world. See explanation 2: 1-5, 150-152, and 4: 150-151.