So, if you're on your way to Aunt Edna's and need a box of chocolates or something, call your nearest branch to see if they can bail you out.

And since they are open 24 hours a day, we wondered when exactly their "Boxing Day" sale might begin. Yup, you guessed it: 12 midnight it is. All Christmas goods are discounted by 50 per cent from regular prices. Expect further mark-downs as merchandise managers arrive for work on Boxing Day itself.

One limitation to the midnight-start of sale prices: Cosmetics departments are closed at 11 p.m. on December 25, so the only way to get an early-bird reduction on a cosmetic item would be to arrive before the section closes, and carry your potential purchase around the store until midnight! (Or shop on Boxing Day, of course.)

To locate your closest SDM store click here to search on their corporate website.