On the Jewish calendar, Yom HaShoah falls on the 27th of the Hebrew month of Nisan, which means the observance will begin at sundown on 26 Nisan.
Growing up in rural Massachusetts, Judaism held a much different context in my life than it does now. Until college, I did Judaism, mimicking the motions of being a "good Jew." I didn't combine milk and meat in my house because my father told me not to.
Although we may think time moves in a linear fashion, Jewish holidays insert themselves in unexpected moments and places, seemingly out-of-sync with our expectations.