Google, Tripadvisor and Restaurantji all print Monday closed and Sunday closed for Danny’s at 5 The Parade, Coulsdon Road, CR5 1EH. That is two days, not a half-day. A Sunday roast from this counter is not on those listings.
Bank holidays can sit on a Monday. Directories will not always update. Phone 01737 551274 if the calendar is awkward.
The working week on those listings is Tuesday to Saturday, 11:00–21:00. See opening hours for the full clock.