Amatul Rahmân Omer:
They ask you about the lunar months. Say, `They are appointed periods of time for (general convenience of) people and for determining the time of Pilgrimage. And it is no virtue that you come into the houses from the backs of them but the true virtue is his who guards against evils. So (instead of fostering superstitious habits) you should rather enter the houses from their proper doors and take Allâh as a shield so that you may be successful.