Barb's binary birthday

My sister Barbara was in town for her birthday. At her request, I baked a delicious lemon cake from The Moosewood Cookbook. It's actually called Sour Cream Orange Cake in the cookbook, but Barb has adapted it to a lemon cake, and it's her birthday favourite. I substituted lemon for orange, Limoncella liqueur for Gran Marnier in the syrup that soaks the baked cake, and baked it into two layer pans instead of a bundt, sliced the two layers to make four, filled it with lemon curd between the layers and frosted it with fresh whipped cream. Did I mention it is a birthday favourite? The cake was about a foot tall when I got finished, and everyone's eyes about popped out when we sang happy birthday. Here's Barb blowing our the candles:

Thank you to Fiona for snapping the photos. Thank you to Barb's and my Dad, for teaching us how to count up birthdays in binary, thus saving us many 30+ cake meltdowns. In case you are checking how old Barb is, please read from left to right from the birthday girl's point of view. Although Barb might tell you otherwise.

question: how do you express your age in binary?

mompoet: ON, ON, off, off, ON, ON this coming November (which is not a prime, and also symmetrical - oh well, there's always next year)