Cocktails at six

It was said a while ago that younger people were beginning again to drink cocktails, out of fashion for some time. Certainly long lists of sometimes very peculiar brews can be found in most pubs and restaurants, but I rarely see anyone drinking them. Julia and I for many years now have enjoyed a cocktail at six in the evening - a pleasant signal that the day's work is done. Well mixed, they can both give you a lift and/or prepare you for a relaxing evening.
The classic dry martini goes without saying (but not without drinking): a measure of gin and the merest glimpse of a dry vermouth - the old story was that the perfect martini consisted of allowing the sunlight to pass through a bottle of vermouth onto the surtface of a glass of ice-cold gin. Ourt favurite cocktail at the moment however is the Bartender: 20 ml dry vermouth, 20 ml sweet vermouth, 20 ml gin, 20 ml dry sherry, 5 ml Grand Marnier -  maybe a touch sweet for some palates, but a gorgeous effect.
We're fond too of the Sidecar - 60 ml brandy, 7 ml Cointreau, 7 ml lemon juice. Actually, there are several good cocktails with Cointreau, including the Kamilkaze (30 ml vodka, 30 ml Cointreau, 30 ml fresh lemon juice, 5 ml lime cordial) and the simple Sidecar (60 ml brandy, 7 ml Cointreau, 7 ml lemon juice). Even simpler, the gimlet - just a measure of gin with a splash of lime juice - the good old gin-and-lime, with plenty of ice.
Oh, dear - 9:05 a.m., and I feel like a . . . no, no - only nine hours to wait.
P.S. - my own invention (names for it welcome) is 60 ml vodka, 20 ml blue curacao, 20 ml sweet vermouth and a splash of lime juice. Maybe just the SixOclock?