So these ladies decided to dress as nuns for their Halloween party and many online users are saying it’s a wrong thing and disrespectful to Christianity.

See comments of people below:

Halloween party always happens in the evening before the Christian holy days of All Hallows’ Day (also known as All Saints’ or Hallowmas) on 1 November and All Souls’ Day on 2 November, thus giving the holiday on 31 October the full name of All Hallows’ Eve (meaning the evening before All Hallows’ Day).