I bottle every year at the end of March for my wife's birthday. The family comes down so we make a day of it. For my whites and Rose' wines that means it has been about 6 months since harvest. For the Reds, about 18 months.
Whites I bulk age for ~ 6 months to bottle. Reds, two years bulk, bottle and another year in the bottle before drinking as a rule. Of course, taste dictates everything, and I taste bulk aging monthly::