Joanna, darling - If it's 2:00 a.m., even in full sun, as we experienced a couple of years ago at Nordkapp, one does not drink Tab. Sambuca would be entirely appropriate. Otherwise, one might choose another adult beverage - I was quite content to stand on our balcony while sipping a very pleasant Macallan single malt scotch. The "never getting dark" thing is a bit weird but kind of cool. Fortunately, after several glasses of Macallan, one tends to doze off irrespective of the sunlight. Better than Ambien, no??